diff --git a/eris/eris/tools.py b/eris/eris/tools.py
index 7413066..dd1f128 100755
--- a/eris/eris/tools.py
+++ b/eris/eris/tools.py
@@ -323,7 +323,7 @@ def python_gut(path):
     for start_line, end_line in _function_body_lines(python_source):
         del lines[start_line-deleted:end_line-deleted]
         deleted += (end_line - start_line)
-    gutted_source = "".join(lines)
+    gutted_source = "".join(lines).expandtabs(tabsize=4)
     return Status.ok, _syntax_highlight_using_path(gutted_source, path)