diff --git a/lib/gitlab_git/blob.rb b/lib/gitlab_git/blob.rb
index cd7a3cc..b52bec1 100644
--- a/lib/gitlab_git/blob.rb
+++ b/lib/gitlab_git/blob.rb
@@ -13,7 +13,7 @@ def initialize(repository, sha, ref, path)
       end
 
       def data
-        if raw_blob
+        if raw_blob and raw_blob.respond_to?('data')
           raw_blob.data
         else
           nil