diff --git a/lib/content_encoding.c b/lib/content_encoding.c
index ac17befaf..473b82b1e 100644
--- a/lib/content_encoding.c
+++ b/lib/content_encoding.c
@@ -210,6 +210,7 @@ static enum {
       return GZIP_UNDERFLOW;
 
     len -= (extra_len + 2);
+    data += (extra_len + 2);
   }
 
   if (flags & ORIG_NAME) {