diff --git a/wmbiff/wmgeneral/wmgeneral.c b/wmbiff/wmgeneral/wmgeneral.c
index 0f8c267..6dfc644 100644
--- a/wmbiff/wmgeneral/wmgeneral.c
+++ b/wmbiff/wmgeneral/wmgeneral.c
@@ -65,6 +65,7 @@
  /* X11 Variables */
 /*****************/
 
+Display *display;
 Window Root;
 int screen;
 int x_fd;
diff --git a/wmbiff/wmgeneral/wmgeneral.h b/wmbiff/wmgeneral/wmgeneral.h
index 8496966..33295b4 100644
--- a/wmbiff/wmgeneral/wmgeneral.h
+++ b/wmbiff/wmgeneral/wmgeneral.h
@@ -36,7 +36,7 @@ typedef struct {
  /* Global variable */
 /*******************/
 
-Display *display;
+extern Display *display;
 
   /***********************/
  /* Function Prototypes */