diff --git a/modules/jenkins/files/slave_scripts/project-requirements-change.py b/modules/jenkins/files/slave_scripts/project-requirements-change.py
index 13a18acf1c..25d1c9cf42 100755
--- a/modules/jenkins/files/slave_scripts/project-requirements-change.py
+++ b/modules/jenkins/files/slave_scripts/project-requirements-change.py
@@ -43,7 +43,8 @@ class RequirementsList(object):
         if not os.path.exists(fn):
             return
         for line in open(fn):
-            line = line[:line.find('#')]
+            if '#' in line:
+                line = line[:line.find('#')]
             line = line.strip()
             if (not line or
                 line.startswith('http://tarballs.openstack.org/') or