diff -Naur src.orig/wmbio.c src/wmbio.c
--- src.orig/wmbio.c	2004-01-21 13:58:12.000000000 +0100
+++ src/wmbio.c	2020-03-08 12:13:32.177944932 +0100
@@ -78,6 +78,8 @@
 struct tm *local;  // for the local time
 time_t tempo;
 
+Display		*display;
+Window          Root, iconwin, win;
 
 /* MAIN */
 int	 main (int argc, char *argv[]);
diff -Naur src.orig/wmgeneral.h src/wmgeneral.h
--- src.orig/wmgeneral.h	2002-04-27 16:02:09.000000000 +0200
+++ src/wmgeneral.h	2020-03-08 12:13:24.853941688 +0100
@@ -24,8 +24,8 @@
 } XpmIcon;
 
 
-Display		*display;
-Window          Root, iconwin, win;
+extern Display		*display;
+extern Window          Root, iconwin, win;
 
 
 void AddMouseRegion(int index, int left, int top, int right, int bottom);