diff --git a/libs/traverselib.h b/libs/traverselib.h
index 99d5c33d..1cd0a95e 100644
--- a/libs/traverselib.h
+++ b/libs/traverselib.h
@@ -372,7 +372,7 @@ public:
   template<typename Functor>
   void forEach(const Functor& functor)
   {
-    for(Values::iterator i = m_values.begin(); i != m_values.end(); ++i)
+    for(typename Values::iterator i = m_values.begin(); i != m_values.end(); ++i)
     {
       functor(*(*i));
     }