diff --git a/src/object_gui.cpp b/src/object_gui.cpp
--- a/src/object_gui.cpp
+++ b/src/object_gui.cpp
@@ -520,10 +520,7 @@ static WindowDesc _build_object_desc(
 	_nested_build_object_widgets, lengthof(_nested_build_object_widgets)
 );
 
-/**
- * Show our object picker.
- * @param w The toolbar window we're associated with.
- */
+/** Show our object picker.  */
 void ShowBuildObjectPicker()
 {
 	/* Don't show the place object button when there are no objects to place. */