diff --git a/pagure/ui/repo.py b/pagure/ui/repo.py
index da200c6..112c364 100644
--- a/pagure/ui/repo.py
+++ b/pagure/ui/repo.py
@@ -354,7 +354,7 @@ def view_file(repo, identifier, filename, username=None):
         content = commit
 
     if isinstance(content, pygit2.Blob):
-        if content.is_binary or not pagure.lib.could_be_text(data):
+        if content.is_binary or not pagure.lib.could_be_text(content.data):
             ext = filename[filename.rfind('.'):]
             if ext in (
                     '.gif', '.png', '.bmp', '.tif', '.tiff', '.jpg',