diff --git a/ng/ngpkg.cpp b/ng/ngpkg.cpp
index 647bd0c9..896344df 100644
--- a/ng/ngpkg.cpp
+++ b/ng/ngpkg.cpp
@@ -25,7 +25,7 @@ The interface between the GUI and the netgen library
 
 // to be sure to include the 'right' togl-version
 #include "Togl2.1/togl.h"
-extern "C" int Togl_PixelScale (const Togl * togl);
+EXTERN int Togl_PixelScale (const Togl * togl);
 
 #include "fonts.hpp"