diff --git a/DDDigi/python/dddigi.py b/DDDigi/python/dddigi.py
index 4b3ba73cbe6d8f8e75371f41f9d4cafecfa717b5..a053bf80b3c3b186a4cd0df9d17c99d14e1e0eb6 100644
--- a/DDDigi/python/dddigi.py
+++ b/DDDigi/python/dddigi.py
@@ -105,9 +105,9 @@ def importConstants(description, namespace=None, debug=False):
   strings = {}
   for c in description.constants():
     if c.second.dataType == 'string':
-      strings[c.first] = c.second.GetTitle()
+      strings[str(c.first)] = c.second.GetTitle()
     else:
-      todo[c.first] = c.second.GetTitle().replace('(int)', '')
+      todo[str(c.first)] = c.second.GetTitle().replace('(int)', '')
   while len(todo) and cnt < 100:
     cnt = cnt + 1
     if cnt == 100:
diff --git a/DDG4/python/DDG4.py b/DDG4/python/DDG4.py
index 10584b35f887dacb4a7238cde28efe37ebe37a18..a496fff7630e125c8eef2ef26e764562523d0978 100644
--- a/DDG4/python/DDG4.py
+++ b/DDG4/python/DDG4.py
@@ -93,9 +93,9 @@ def importConstants(description, namespace=None, debug=False):
   strings = {}
   for c in description.constants():
     if c.second.dataType == 'string':
-      strings[c.first] = c.second.GetTitle()
+      strings[str(c.first)] = c.second.GetTitle()
     else:
-      todo[c.first] = c.second.GetTitle().replace('(int)', '')
+      todo[str(c.first)] = c.second.GetTitle().replace('(int)', '')
   while len(todo) and cnt < 100:
     cnt = cnt + 1
     if cnt == 100: