diff --git a/include/DOM/Events/Event.hpp b/include/DOM/Events/Event.hpp
index 4ecf98f8..cd4e1606 100644
--- a/include/DOM/Events/Event.hpp
+++ b/include/DOM/Events/Event.hpp
@@ -89,7 +89,7 @@ class Event_impl
 
     virtual bool getCancelable() const = 0;
 
-    virtual long getTimeStamp() const = 0;
+    virtual unsigned long long getTimeStamp() const = 0;
 
     virtual void stopPropagation() = 0;
 
diff --git a/include/DOM/Simple/EventImpl.hpp b/include/DOM/Simple/EventImpl.hpp
index cc88bdec..4b18df4e 100644
--- a/include/DOM/Simple/EventImpl.hpp
+++ b/include/DOM/Simple/EventImpl.hpp
@@ -86,7 +86,7 @@ class EventImpl : virtual public Arabica::DOM::Events::Event_impl<stringT, strin
       return canCancel_;
     }
 
-    virtual long getTimeStamp() const
+    virtual unsigned long long getTimeStamp() const
     {
       return timeStamp_;
     }
diff --git a/vs2012/test_xslt_wide.vcxproj.bak b/vs2012/test_xslt_wide.vcxproj.bak
deleted file mode 100644
index daca35b8..00000000
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