--- ./src/socket.h.orig	2022-02-21 16:28:45.238684375 +0530
+++ ./src/socket.h	2022-02-21 16:29:04.798684367 +0530
@@ -21,7 +21,7 @@
 #define CONN_BG		0x08
 #define CONN_FG		0x10
 
-struct World   *world_decl;	/* declares struct World */
+extern struct World   *world_decl;	/* declares struct World */
 
 extern String *incoming_text;
 extern int quit_flag;
