diff -Naur wminet-3.0.0.orig/src/wmgeneral.h wminet-3.0.0/src/wmgeneral.h
--- wminet-3.0.0.orig/src/wmgeneral.h	2001-12-02 19:03:14.000000000 +0100
+++ wminet-3.0.0/src/wmgeneral.h	2021-01-01 22:51:46.875206930 +0100
@@ -15,7 +15,7 @@
  /* Global variable */
 /*******************/
 
-Display		*display;
+extern Display		*display;
 
   /***********************/
  /* Function Prototypes */
diff -Naur wminet-3.0.0.orig/src/wminet.c wminet-3.0.0/src/wminet.c
--- wminet-3.0.0.orig/src/wminet.c	2001-11-24 12:03:32.000000000 +0100
+++ wminet-3.0.0/src/wminet.c	2021-01-01 22:51:41.493202753 +0100
@@ -78,6 +78,7 @@
 /* Globals                                */
 /******************************************/
 
+Display		*display;
 char mask[MASK_WIDTH * MASK_HEIGHT];
 int monitor_tcp = 0;
 int monitor_udp = 0;