diff --git a/contrib/include/wx/ogl/misc.h b/contrib/include/wx/ogl/misc.h
index 534c748729..71e249f8d0 100644
--- a/contrib/include/wx/ogl/misc.h
+++ b/contrib/include/wx/ogl/misc.h
@@ -101,12 +101,12 @@ extern wxPen*           g_oglTransparentPen;
 extern wxBrush*         g_oglWhiteBackgroundBrush;
 extern wxPen*           g_oglBlackForegroundPen;
 
-extern wxFont*          oglMatchFont(int point_size);
+WXDLLIMPEXP_OGL wxFont*          oglMatchFont(int point_size);
 
-extern wxString         oglColourToHex(const wxColour& colour);
-extern wxColour         oglHexToColour(const wxString& hex);
-extern void             oglDecToHex(unsigned int dec, char *buf);
-extern unsigned int     oglHexToDec(char* buf);
+WXDLLIMPEXP_OGL wxString         oglColourToHex(const wxColour& colour);
+WXDLLIMPEXP_OGL wxColour         oglHexToColour(const wxString& hex);
+WXDLLIMPEXP_OGL void             oglDecToHex(unsigned int dec, char *buf);
+WXDLLIMPEXP_OGL unsigned int     oglHexToDec(char* buf);
 
 
 #endif