--- hatari/src/includes/sdlgui.h	2019/04/09 08:49:28	1.1.1.9
+++ hatari/src/includes/sdlgui.h	2019/04/09 08:53:07	1.1.1.11
@@ -1,8 +1,8 @@
 /*
   Hatari - sdlgui.h
 
-  This file is distributed under the GNU Public License, version 2 or at
-  your option any later version. Read the file gpl.txt for details.
+  This file is distributed under the GNU General Public License, version 2
+  or at your option any later version. Read the file gpl.txt for details.
 
   Header for the tiny graphical user interface for Hatari.
 */
@@ -61,8 +61,8 @@ typedef struct
   char *txt;            /* Text string */
 }  SGOBJ;
 
-int sdlgui_fontwidth;	/* Width of the actual font */
-int sdlgui_fontheight;	/* Height of the actual font */
+extern int sdlgui_fontwidth;	/* Width of the actual font */
+extern int sdlgui_fontheight;	/* Height of the actual font */
 
 extern int SDLGui_Init(void);
 extern int SDLGui_UnInit(void);