diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c
index d721a1af19721fc0202ba9985b1278a04871b039..f855dcbbdfb854e1704566ae0cebd187c656c45f 100644
--- a/fs/udf/balloc.c
+++ b/fs/udf/balloc.c
@@ -145,7 +145,7 @@ static bool udf_add_free_space(struct udf_sb_info *sbi,
 {
 	struct logicalVolIntegrityDesc *lvid;
 
-	if (sbi->s_lvid_bh)
+	if (sbi->s_lvid_bh == NULL)
 		return false;
 
 	lvid = (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;