diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index ce62a38..cec0fa2 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -166,6 +166,8 @@
 	}
 
 	if (compressed) {
+		if (!msblk->stream)
+			goto read_failure;
 		length = squashfs_decompress(msblk, bh, b, offset, length,
 			output);
 		if (length < 0)