diff --git a/include/asterisk/linkedlists.h b/include/asterisk/linkedlists.h
index 94e57f1e64..48f13a9715 100644
--- a/include/asterisk/linkedlists.h
+++ b/include/asterisk/linkedlists.h
@@ -363,6 +363,7 @@ struct {								\
 #define AST_LIST_HEAD_INIT(head) {					\
 	(head)->first = NULL;						\
 	(head)->last = NULL;						\
+	(head)->lock = AST_MUTEX_INIT_VALUE;				\
 	ast_mutex_init(&(head)->lock);					\
 }