diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 6f161abe2867220ec2fb5ca549f484ddd2dffe49..a340eeedd6c77ad8f1734e8669c4c02891d574ed 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1751,7 +1751,11 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
 update_block:
 	ret = update_block_group(trans, root, ins->objectid, ins->offset, 1, 0,
 				 data);
-	BUG_ON(ret);
+	if (ret) {
+		printk("update block group failed for %Lu %Lu\n",
+		       ins->objectid, ins->offset);
+		BUG();
+	}
 	return 0;
 }