diff --git a/src/generic/numdlgg.cpp b/src/generic/numdlgg.cpp
index 2c6ffa665d..ed2103030d 100644
--- a/src/generic/numdlgg.cpp
+++ b/src/generic/numdlgg.cpp
@@ -18,7 +18,7 @@
 // ----------------------------------------------------------------------------
 
 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "numdlgg.cpp"
+    #pragma implementation "numdlgg.h"
 #endif
 
 // For compilers that support precompilation, includes "wx.h".