diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
index 8e64ce6..75cf08b 100644
--- a/lib/lz4/lz4_decompress.c
+++ b/lib/lz4/lz4_decompress.c
@@ -73,6 +73,8 @@
 			len = *ip++;
 			for (; len == 255; length += 255)
 				len = *ip++;
+			if (unlikely(length > (size_t)(length + len)))
+				goto _output_error;
 			length += len;
 		}