diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index c4068f6..4bdd160 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3645,7 +3645,7 @@
 	unsigned int credits, blkbits = inode->i_blkbits;
 
 	/* We only support the FALLOC_FL_KEEP_SIZE mode */
-	if (mode && (mode != FALLOC_FL_KEEP_SIZE))
+	if (mode & ~FALLOC_FL_KEEP_SIZE)
 		return -EOPNOTSUPP;
 
 	/*