--- lib/Xt/IntrinsicI.h.xx	2005-02-01 11:48:09.000000000 +0100
+++ lib/Xt/IntrinsicI.h	2005-02-01 16:09:16.418635566 +0100
@@ -223,11 +223,18 @@
 
 #ifdef XT_GEO_TATTLER
 
+
+#if defined(__GNUC__) && ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)))
+# define _XT_ATTRIBUTE_PRINTF(x,y) __attribute__((__format__(__printf__,x,y)))
+#else
+# define _XT_ATTRIBUTE_PRINTF(x,y)
+#endif
 extern void _XtGeoTab (int);
 extern void _XtGeoTrace (
 			    Widget widget, 
 			    ...
-);
+) _XT_ATTRIBUTE_PRINTF(2,3);
+#undef _XT_ATTRIBUTE_PRINTF
 
 #define CALLGEOTAT(f) f