diff --git a/git.c b/git.c
index 72039c69cb..b4a1ef2bc8 100644
--- a/git.c
+++ b/git.c
@@ -172,7 +172,7 @@ static void list_commands(const char *exec_path, const char *pattern)
 	putchar('\n');
 }
 
-static void list_common_cmds_help()
+static void list_common_cmds_help(void)
 {
 	int i, longest = 0;
 
diff --git a/http-push.c b/http-push.c
index 21c5289cde..ba7d9de234 100644
--- a/http-push.c
+++ b/http-push.c
@@ -622,7 +622,7 @@ static int refresh_lock(struct remote_lock *lock)
 	return rc;
 }
 
-static void check_locks()
+static void check_locks(void)
 {
 	struct remote_lock *lock = remote->locks;
 	time_t current_time = time(NULL);