diff --git a/sco_moduleimpl_status.py b/sco_moduleimpl_status.py
index dd74cde5..cf6941b3 100644
--- a/sco_moduleimpl_status.py
+++ b/sco_moduleimpl_status.py
@@ -362,7 +362,7 @@ def moduleimpl_status(context, moduleimpl_id=None, partition_id=None, REQUEST=No
             )
         H.append("&nbsp;&nbsp;&nbsp; <em>%(description)s</em>" % eval)
         H.append(
-            "<div id='hidden_id' style='visibility:hidden'>%s</div>" % evaluation_id
+            "<div id='hidden_id' style='visibility:hidden'>%(evaluation_id)s</div>"
         )
         if eval["evaluation_type"] == EVALUATION_RATTRAPAGE:
             H.append(