diff --git a/fs/isofs/export.c b/fs/isofs/export.c
index 35768a63fb1d23639f33e0d6ac1d2eb8c21ea811..421d247fae52301b778f0589b27fcf48f2372832 100644
--- a/fs/isofs/export.c
+++ b/fs/isofs/export.c
@@ -180,7 +180,7 @@ static struct dentry *isofs_fh_to_parent(struct super_block *sb,
 		return NULL;
 
 	return isofs_export_iget(sb,
-			fh_len > 2 ? ifid->parent_block : 0,
+			fh_len > 3 ? ifid->parent_block : 0,
 			ifid->parent_offset,
 			fh_len > 4 ? ifid->parent_generation : 0);
 }