diff --git a/ext/session/mod_files.c b/ext/session/mod_files.c
index 1da25ba583eaa..e774de74e63a0 100644
--- a/ext/session/mod_files.c
+++ b/ext/session/mod_files.c
@@ -292,7 +292,7 @@ static int ps_files_cleanup_dir(const char *dirname, zend_long maxlifetime)
 	dir = opendir(dirname);
 	if (!dir) {
 		php_error_docref(NULL, E_NOTICE, "ps_files_cleanup_dir: opendir(%s) failed: %s (%d)", dirname, strerror(errno), errno);
-		return (0);
+		return -1;
 	}
 
 	time(&now);
@@ -302,7 +302,7 @@ static int ps_files_cleanup_dir(const char *dirname, zend_long maxlifetime)
 	if (dirname_len >= MAXPATHLEN) {
 		php_error_docref(NULL, E_NOTICE, "ps_files_cleanup_dir: dirname(%s) is too long", dirname);
 		closedir(dir);
-		return (0);
+		return -1;
 	}
 
 	/* Prepare buffer (dirname never changes) */