diff --git a/src/blitter/32bpp_optimized.cpp b/src/blitter/32bpp_optimized.cpp
index da38560abf..9c42b6a44f 100644
--- a/src/blitter/32bpp_optimized.cpp
+++ b/src/blitter/32bpp_optimized.cpp
@@ -21,7 +21,7 @@ static FBlitter_32bppOptimized iFBlitter_32bppOptimized;
 /**
  * Draws a sprite to a (screen) buffer. It is templated to allow faster operation.
  *
- * @param mode blitter mode
+ * @tparam mode blitter mode
  * @param bp further blitting parameters
  * @param zoom zoom level at which we are drawing
  */
diff --git a/src/core/alloc_func.hpp b/src/core/alloc_func.hpp
index e86a347636..5268803e81 100644
--- a/src/core/alloc_func.hpp
+++ b/src/core/alloc_func.hpp
@@ -27,7 +27,7 @@ void NORETURN ReallocError(size_t size);
  * type.
  * @note throws an error when there is no memory anymore.
  * @note the memory contains garbage data (i.e. possibly non-zero values).
- * @param T the type of the variable(s) to allocation.
+ * @tparam T the type of the variable(s) to allocation.
  * @param num_elements the number of elements to allocate of the given type.
  * @return NULL when num_elements == 0, non-NULL otherwise.
  */
@@ -52,7 +52,7 @@ static FORCEINLINE T *MallocT(size_t num_elements)
  * type.
  * @note throws an error when there is no memory anymore.
  * @note the memory contains all zero values.
- * @param T the type of the variable(s) to allocation.
+ * @tparam T the type of the variable(s) to allocation.
  * @param num_elements the number of elements to allocate of the given type.
  * @return NULL when num_elements == 0, non-NULL otherwise.
  */
@@ -77,7 +77,7 @@ static FORCEINLINE T *CallocT(size_t num_elements)
  * type. It extends/shrinks the memory allocation given in t_ptr.
  * @note throws an error when there is no memory anymore.
  * @note the pointer to the data may change, but the data will remain valid.
- * @param T the type of the variable(s) to allocation.
+ * @tparam T the type of the variable(s) to allocation.
  * @param t_ptr the previous allocation to extend/shrink.
  * @param num_elements the number of elements to allocate of the given type.
  * @return NULL when num_elements == 0, non-NULL otherwise.
diff --git a/src/depot_gui.cpp b/src/depot_gui.cpp
index 9dba83ad4c..60365f7aed 100644
--- a/src/depot_gui.cpp
+++ b/src/depot_gui.cpp
@@ -262,8 +262,7 @@ struct DepotWindow : Window {
 	}
 
 	/** Draw a vehicle in the depot window in the box with the top left corner at x,y
-	 * @param *w Window to draw in
-	 * @param *v Vehicle to draw
+	 * @param v Vehicle to draw
 	 * @param x Left side of the box to draw in
 	 * @param y Top of the box to draw in
 	 */
diff --git a/src/economy.cpp b/src/economy.cpp
index 10be114e2c..ccb673bd55 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -989,7 +989,6 @@ static void TriggerIndustryProduction(Industry *i)
 /**
  * Makes us a new cargo payment helper.
  * @param front The front of the train
- * @param destinations List to add the destinations of 'our' cargo to
  */
 CargoPayment::CargoPayment(Vehicle *front) :
 	front(front),
diff --git a/src/newgrf_industries.cpp b/src/newgrf_industries.cpp
index 9dd2e56d35..1be3ee64e1 100644
--- a/src/newgrf_industries.cpp
+++ b/src/newgrf_industries.cpp
@@ -156,7 +156,6 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
  * @param variable that is queried
  * @param parameter unused
  * @param available will return false if ever the variable asked for does not exist
- * @param ind is of course the industry we are inquiring
  * @return the value stored in the corresponding variable*/
 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
 {
diff --git a/src/osk_gui.cpp b/src/osk_gui.cpp
index e209ed1a60..ce6d343a96 100644
--- a/src/osk_gui.cpp
+++ b/src/osk_gui.cpp
@@ -534,8 +534,6 @@ void GetKeyboardLayout()
 /**
  * Show the on-screen keyboard (osk) associated with a given textbox
  * @param parent pointer to the Window where this keyboard originated from
- * @param q      querystr_d pointer to the query string of the parent, which is
- *               shared for both windows
  * @param button widget number of parent's textbox
  * @param cancel widget number of parent's cancel button (0 if cancel events
  *               should not be passed)
diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index 7822338b1b..282154a196 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -636,7 +636,6 @@ struct BuildRailToolbarWindow : Window {
 
 	/** Configures the rail toolbar for railtype given
 	 * @param railtype the railtype to display
-	 * @param w the window to modify
 	 */
 	void SetupRailToolbar(RailType railtype)
 	{
@@ -1933,10 +1932,10 @@ static void SetDefaultRailGui()
 /**
  * Updates the current signal variant used in the signal GUI
  * to the one adequate to current year.
- * @param 0 needed to be called when a setting changes
+ * @param p needed to be called when a setting changes
  * @return success, needed for settings
  */
-bool ResetSignalVariant(int32 = 0)
+bool ResetSignalVariant(int32 p = 0)
 {
 	SignalVariant new_variant = (_cur_year < _settings_client.gui.semaphore_build_before ? SIG_SEMAPHORE : SIG_ELECTRIC);
 
diff --git a/src/rail_map.h b/src/rail_map.h
index 5a203aa2bb..f9cca02f0b 100644
--- a/src/rail_map.h
+++ b/src/rail_map.h
@@ -368,7 +368,7 @@ static inline void SetSignalStates(TileIndex tile, uint state)
 /**
  * Set the states of the signals (Along/AgainstTrackDir)
  * @param tile  the tile to set the states for
- * @param state the new state
+ * @return the state of the signals
  */
 static inline uint GetSignalStates(TileIndex tile)
 {
diff --git a/src/road_cmd.cpp b/src/road_cmd.cpp
index 3b859c6db8..b3e8e48890 100644
--- a/src/road_cmd.cpp
+++ b/src/road_cmd.cpp
@@ -1269,7 +1269,6 @@ void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
 /**
  * Updates cached nearest town for all road tiles
  * @param invalidate are we just invalidating cached data?
- * @param ignore town that should be ignored (because we are deleting it now)
  * @pre invalidate == true implies _generating_world == true
  */
 void UpdateNearestTownForRoadTiles(bool invalidate)
diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
index b1d2625d5d..0124740ba3 100644
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -61,7 +61,6 @@ extern void InitializeRailGUI();
  * This as for example docks and shipdepots do not store
  * whether the tile used to be canal or 'normal' water.
  * @param t the tile to change.
- * @param o the owner of the new tile.
  * @param include_invalid_water_class Also consider WATER_CLASS_INVALID, i.e. industry tiles on land
  */
 void SetWaterClassDependingOnSurroundings(TileIndex t, bool include_invalid_water_class)
diff --git a/src/settings.cpp b/src/settings.cpp
index ac01cfd302..ba7cec8ad1 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1492,10 +1492,8 @@ CommandCost CmdChangeCompanySetting(TileIndex tile, DoCommandFlag flags, uint32
 /** Top function to save the new value of an element of the Settings struct
  * @param index offset in the SettingDesc array of the Settings struct which
  * identifies the setting member we want to change
- * @param object pointer to a valid settings struct that has its settings change.
- * This only affects setting-members that are not needed to be the same on all
- * clients in a network game.
- * @param value new value of the setting */
+ * @param value new value of the setting
+ */
 bool SetSettingValue(uint index, int32 value)
 {
 	const SettingDesc *sd = &_settings[index];
@@ -1526,8 +1524,8 @@ bool SetSettingValue(uint index, int32 value)
 /** Top function to save the new value of an element of the Settings struct
  * @param index offset in the SettingDesc array of the CompanySettings struct
  * which identifies the setting member we want to change
- * @param object pointer to a valid CompanySettings struct that has its settings changed.
- * @param value new value of the setting */
+ * @param value new value of the setting
+ */
 void SetCompanySetting(uint index, int32 value)
 {
 	const SettingDesc *sd = &_company_settings[index];
diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
index 7e17570052..850f92933d 100644
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -647,9 +647,6 @@ public:
 	 * <li>Town names (optional)</li></ol>
 	 *
 	 * @param dpi pointer to pixel to write onto
-	 * @param w pointer to Window struct
-	 * @param type type of map requested (vegetation, owners, routes, etc)
-	 * @param show_towns true if the town names should be displayed, false if not.
 	 */
 	void DrawSmallMap(DrawPixelInfo *dpi)
 	{
diff --git a/src/spritecache.cpp b/src/spritecache.cpp
index b139573a22..9913475523 100644
--- a/src/spritecache.cpp
+++ b/src/spritecache.cpp
@@ -493,7 +493,6 @@ void *AllocSprite(size_t mem_req)
  * For ST_FONT sprites, it is normal. In other cases, default sprite is loaded instead.
  * @param sprite ID of loaded sprite
  * @param requested requested sprite type
- * @param available available sprite type
  * @param sc the currently known sprite cache for the requested sprite
  * @return fallback sprite
  * @note this function will do usererror() in the case the fallback sprite isn't available */
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index 5cbc4a4fd3..2c4cb14dfd 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -863,7 +863,7 @@ void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSp
 /**
  * Find a nearby station that joins this station.
  * @tparam T the class to find a station for
- * @param error_message the error message when building a station on top of others
+ * @tparam error_message the error message when building a station on top of others
  * @param existing_station an existing station we build over
  * @param station_to_join the station to join to
  * @param adjacent whether adjacent stations are allowed
diff --git a/src/strings_func.h b/src/strings_func.h
index bbf1739b17..1cc286f0da 100644
--- a/src/strings_func.h
+++ b/src/strings_func.h
@@ -59,7 +59,6 @@ static inline uint64 GetDParamX(const uint64 *s, uint n)
 
 /**
  * Get the current string parameter at index \a n from the global string parameter array.
- * @param s Array of string parameters.
  * @param n Index of the string parameter.
  * @return Value of the requested string parameter.
  */
diff --git a/src/terraform_cmd.cpp b/src/terraform_cmd.cpp
index d569b15b9b..9270592fd2 100644
--- a/src/terraform_cmd.cpp
+++ b/src/terraform_cmd.cpp
@@ -149,7 +149,7 @@ static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)
  * @param ts TerraformerState.
  * @param tile Tile.
  * @param height Aimed height.
- * @param return Error code or cost.
+ * @return Error code or cost.
  */
 static CommandCost TerraformTileHeight(TerraformerState *ts, TileIndex tile, int height)
 {
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
index a4e9d27be8..aa935d2da2 100644
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -1486,7 +1486,6 @@ void UpdateTownMaxPass(Town *t)
  * @param tile Where to put it
  * @param townnameparts The town name
  * @param size Parameter for size determination
- * @param size_mode How the size should be determined
  * @param city whether to build a city or town
  * @param layout the (road) layout of the town
  */
diff --git a/src/widget.cpp b/src/widget.cpp
index 3108409ea4..c84269ce1d 100644
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -2356,7 +2356,7 @@ Scrollbar *NWidgetLeaf::FindScrollbar(Window *w, bool allow_next)
  * @param pt Point in the widget.
  * @return The point refers to the button.
  *
- * @param The magic constants are also used at #DrawButtonDropdown.
+ * @note The magic constants are also used at #DrawButtonDropdown.
  */
 bool NWidgetLeaf::ButtonHit(const Point &pt)
 {