diff --git a/utils/check_expr.c b/utils/check_expr.c
index 70714d40d9..8b13626411 100644
--- a/utils/check_expr.c
+++ b/utils/check_expr.c
@@ -88,17 +88,21 @@ int __ast_str_helper(struct ast_str **buf, size_t max_len,
 	return res;
 }
 
+void ast_store_lock_info(enum ast_lock_type type, const char *filename,
+		        int line_num, const char *func, const char *lock_name, void *lock_addr);
 void ast_store_lock_info(enum ast_lock_type type, const char *filename,
 		        int line_num, const char *func, const char *lock_name, void *lock_addr)
 {
     /* not a lot to do in a standalone w/o threading! */
 }
 
+void ast_mark_lock_acquired(void);
 void ast_mark_lock_acquired(void)
 {
     /* not a lot to do in a standalone w/o threading! */
 }
 
+void ast_remove_lock_info(void *lock_addr);
 void ast_remove_lock_info(void *lock_addr)
 {
     /* not a lot to do in a standalone w/o threading! */