diff --git a/DDCore/include/DD4hep/Shapes.h b/DDCore/include/DD4hep/Shapes.h
index f856e11528c4111204b1ceed83947b8bc44962d7..057aba4fc7e82fb6e24037db4d07aaef2caeb1d7 100644
--- a/DDCore/include/DD4hep/Shapes.h
+++ b/DDCore/include/DD4hep/Shapes.h
@@ -250,7 +250,7 @@ namespace dd4hep {
   /// Intermediate class to overcome drawing probles with the TGeoTubeSeg
   class MyConeSeg: public TGeoConeSeg {
   public:
-    MyConeSeg() : TGeoConeSeg() { }
+    MyConeSeg() : TGeoConeSeg(0.0,0.0,0.0,0.0,0.0,0.0,0.0) { }
     virtual ~MyConeSeg() { }
     double GetRmin() const {        return GetRmin1();      }
     double GetRmax() const {        return GetRmax1();      }