diff --git a/ext/standard/filestat.c b/ext/standard/filestat.c
index 3ace3c75517..60a3a53ccb1 100644
--- a/ext/standard/filestat.c
+++ b/ext/standard/filestat.c
@@ -877,7 +877,7 @@ PHPAPI void php_stat(const char *filename, php_stat_len filename_length, int typ
 			gid_t *gids;
 
 			groups = getgroups(0, NULL);
-			if(groups) {
+			if(groups > 0) {
 				gids=(gid_t *)safe_emalloc(groups, sizeof(gid_t), 0);
 				n=getgroups(groups, gids);
 				for(i=0;i<n;i++){