diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index e993091..ba2527d 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -423,8 +423,9 @@
 			/* we didn't make progress in this inflate
 			 * call, we're done
 			 */
-			if (ret != Z_STREAM_END)
+			if (ret != Z_STREAM_END) {
 				ret = -1;
+			}
 			break;
 		}