Index: include/tcl_db.h
--- include/tcl_db.h.orig
+++ include/tcl_db.h
@@ -114,7 +114,7 @@ typedef struct dbtcl_info {
 } DBTCL_INFO;
 
 extern int __debug_on, __debug_print, __debug_stop, __debug_test;
-LIST_HEAD(infohead, dbtcl_info) __db_infohead;
+extern LIST_HEAD(infohead, dbtcl_info) __db_infohead;
 
 #define	i_anyp un.anyp
 #define	i_pagep un.anyp