diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index d4e076c9c2ab6d864d966baa537c8e1c14a47a76..acef87d9af588de9b0d4b4a918026dbaf42682b6 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -26,7 +26,7 @@ do { \
 		YYABORT; \
 } while (0)
 
-static struct list_head* alloc_list()
+static struct list_head* alloc_list(void)
 {
 	struct list_head *list;