diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
index e30657dbc7..074018085b 100644
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -1868,7 +1868,7 @@
 				>
 			</File>
 			<File
-				RelativePath=".\..\src\waypoints_gui.cpp"
+				RelativePath=".\..\src\waypoint_gui.cpp"
 				>
 			</File>
 		</Filter>
diff --git a/projects/openttd_vs90.vcproj b/projects/openttd_vs90.vcproj
index f506c249f9..9b4c78fa53 100644
--- a/projects/openttd_vs90.vcproj
+++ b/projects/openttd_vs90.vcproj
@@ -1865,7 +1865,7 @@
 				>
 			</File>
 			<File
-				RelativePath=".\..\src\waypoints_gui.cpp"
+				RelativePath=".\..\src\waypoint_gui.cpp"
 				>
 			</File>
 		</Filter>
diff --git a/source.list b/source.list
index 84c9ef2aa6..2ae0586535 100644
--- a/source.list
+++ b/source.list
@@ -410,7 +410,7 @@ train_gui.cpp
 transparency_gui.cpp
 tree_gui.cpp
 vehicle_gui.cpp
-waypoints_gui.cpp
+waypoint_gui.cpp
 
 # Command handlers
 aircraft_cmd.cpp
diff --git a/src/waypoints_gui.cpp b/src/waypoint_gui.cpp
similarity index 100%
rename from src/waypoints_gui.cpp
rename to src/waypoint_gui.cpp