diff --git a/src/script/script_instance.cpp b/src/script/script_instance.cpp
index ab38f5d977..4a1dc499ac 100644
--- a/src/script/script_instance.cpp
+++ b/src/script/script_instance.cpp
@@ -32,6 +32,7 @@
 
 #include "../safeguards.h"
 
+ScriptStorage::ScriptStorage() = default;
 ScriptStorage::~ScriptStorage()
 {
 	/* Free our pointers */
diff --git a/src/script/script_storage.hpp b/src/script/script_storage.hpp
index 3e52605823..d77cbb8594 100644
--- a/src/script/script_storage.hpp
+++ b/src/script/script_storage.hpp
@@ -36,53 +36,35 @@ typedef bool (ScriptAsyncModeProc)();
 class ScriptStorage {
 friend class ScriptObject;
 private:
-	ScriptModeProc *mode;             ///< The current build mode we are int.
-	class ScriptObject *mode_instance; ///< The instance belonging to the current build mode.
-	ScriptAsyncModeProc *async_mode;         ///< The current command async mode we are in.
-	class ScriptObject *async_mode_instance; ///< The instance belonging to the current command async mode.
-	CompanyID root_company;          ///< The root company, the company that the script really belongs to.
-	CompanyID company;               ///< The current company.
+	ScriptModeProc *mode = nullptr; ///< The current build mode we are int.
+	class ScriptObject *mode_instance = nullptr; ///< The instance belonging to the current build mode.
+	ScriptAsyncModeProc *async_mode = nullptr; ///< The current command async mode we are in.
+	class ScriptObject *async_mode_instance = nullptr; ///< The instance belonging to the current command async mode.
+	CompanyID root_company = INVALID_OWNER; ///< The root company, the company that the script really belongs to.
+	CompanyID company = INVALID_OWNER; ///< The current company.
 
-	uint delay;                      ///< The ticks of delay each DoCommand has.
-	bool allow_do_command;           ///< Is the usage of DoCommands restricted?
+	uint delay = 1; ///< The ticks of delay each DoCommand has.
+	bool allow_do_command = true; ///< Is the usage of DoCommands restricted?
 
-	CommandCost costs;               ///< The costs the script is tracking.
-	Money last_cost;                 ///< The last cost of the command.
+	CommandCost costs; ///< The costs the script is tracking.
+	Money last_cost = 0; ///< The last cost of the command.
 	ScriptErrorType last_error{}; ///< The last error of the command.
-	bool last_command_res;           ///< The last result of the command.
+	bool last_command_res = true; ///< The last result of the command.
 
-	CommandDataBuffer last_data;     ///< The last data passed to a command.
-	Commands last_cmd;               ///< The last cmd passed to a command.
-	CommandDataBuffer last_cmd_ret;  ///< The extra data returned by the last command.
+	CommandDataBuffer last_data; ///< The last data passed to a command.
+	Commands last_cmd = CMD_END; ///< The last cmd passed to a command.
+	CommandDataBuffer last_cmd_ret; ///< The extra data returned by the last command.
 
 	std::vector<int> callback_value; ///< The values which need to survive a callback.
 
-	RoadType road_type;              ///< The current roadtype we build.
-	RailType rail_type;              ///< The current railtype we build.
+	RoadType road_type = INVALID_ROADTYPE; ///< The current roadtype we build.
+	RailType rail_type = INVALID_RAILTYPE; ///< The current railtype we build.
 
-	void *event_data;                ///< Pointer to the event data storage.
-	ScriptLogTypes::LogData log_data;///< Log data storage.
+	void *event_data = nullptr; ///< Event queue for this script.
+	ScriptLogTypes::LogData log_data; ///< Log data storage.
 
 public:
-	ScriptStorage() :
-		mode              (nullptr),
-		mode_instance     (nullptr),
-		async_mode        (nullptr),
-		async_mode_instance (nullptr),
-		root_company      (INVALID_OWNER),
-		company           (INVALID_OWNER),
-		delay             (1),
-		allow_do_command  (true),
-		/* costs (can't be set) */
-		last_cost         (0),
-		last_command_res  (true),
-		last_cmd          (CMD_END),
-		/* calback_value (can't be set) */
-		road_type         (INVALID_ROADTYPE),
-		rail_type         (INVALID_RAILTYPE),
-		event_data        (nullptr)
-	{ }
-
+	ScriptStorage();
 	~ScriptStorage();
 };