diff --git a/samples/controls/controls.cpp b/samples/controls/controls.cpp
index cc5fd34abe..e997f1dc6a 100644
--- a/samples/controls/controls.cpp
+++ b/samples/controls/controls.cpp
@@ -9,8 +9,7 @@
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
-#pragma implementation "controls.cpp"
-#pragma interface "controls.cpp"
+#pragma interface "controls.h"
 #endif
 
 // For compilers that support precompilation, includes "wx/wx.h".