diff --git a/include/wx/geometry.h b/include/wx/geometry.h
index 1d42615fa0..1dedc55fc5 100644
--- a/include/wx/geometry.h
+++ b/include/wx/geometry.h
@@ -13,7 +13,7 @@
 #define _WX_GEOMETRY_H_
 
 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma interface "geometry.cpp"
+    #pragma interface "geometry.h"
 #endif
 
 #include "wx/defs.h"
diff --git a/src/common/geometry.cpp b/src/common/geometry.cpp
index d74af422a9..1eb3d7b26f 100644
--- a/src/common/geometry.cpp
+++ b/src/common/geometry.cpp
@@ -10,7 +10,7 @@
 /////////////////////////////////////////////////////////////////////////////
 
 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "geometry.cpp"
+    #pragma implementation "geometry.h"
 #endif
 
 // For compilers that support precompilation, includes "wx.h".