diff --git a/samples/checklst/checklst.cpp b/samples/checklst/checklst.cpp
index c8610926a8..26f90fa53d 100644
--- a/samples/checklst/checklst.cpp
+++ b/samples/checklst/checklst.cpp
@@ -9,9 +9,9 @@
 // Licence:     wxWindows license
 ///////////////////////////////////////////////////////////////////////////////
 
-// ============================================================================
-// headers & declarations
-// ============================================================================
+#ifdef __GNUG__
+//#pragma implementation
+#endif
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"