diff -Naur wmbinclock-0.5.orig/wmBinClock.c wmbinclock-0.5/wmBinClock.c
--- wmbinclock-0.5.orig/wmBinClock.c	2005-06-21 19:57:58.000000000 +0200
+++ wmbinclock-0.5/wmBinClock.c	2020-03-01 16:01:16.622171968 +0100
@@ -72,6 +72,13 @@
 int GotFirstClick3, GotDoubleClick3;
 int DblClkDelay;
 
+Display		*display;
+Window          Root;
+Window          iconwin, win;
+int             screen; 
+int             DisplayDepth;
+GC NormalGC;
+
 void IntToBinary(int x, int *str[]);
 void PrintHelp(char err[]);
 
diff -Naur wmbinclock-0.5.orig/xutils.h wmbinclock-0.5/xutils.h
--- wmbinclock-0.5.orig/xutils.h	2005-02-04 23:06:34.000000000 +0100
+++ wmbinclock-0.5/xutils.h	2020-03-01 16:01:24.721173796 +0100
@@ -18,12 +18,12 @@
 /*
  *   Global variable
  */
-Display		*display;
-Window          Root;
-Window          iconwin, win;
-int             screen; 
-int             DisplayDepth;
-GC NormalGC;
+extern Display		*display;
+extern Window          Root;
+extern Window          iconwin, win;
+extern int             screen; 
+extern int             DisplayDepth;
+extern GC NormalGC;