diff --git a/userconfig/tools.py b/userconfig/tools.py
index da55773..63d3d24 100644
--- a/userconfig/tools.py
+++ b/userconfig/tools.py
@@ -59,7 +59,7 @@ def read_skip_comment(fp, commentstring):
 
 def diff(destfile, tempfile, commentstring, cfg):
     """diff destfile and tempfile, returns True if files differ, False if they are the same"""
-    cfg.debug.stdout("Diffing %s and %s" % (destfile, tempfile), 3)
+    cfg.debug.stdout("Diffing %s and %s, comment: %s" % (destfile, tempfile, commentstring), 3)
     if not os.path.isfile(destfile):
         cfg.debug.stdout("Destfile %s does not exist, returning True." % destfile, 3)
         # destfile does not exist -> copy tempfile over