diff --git a/DDTest/src/test_shapes.cc b/DDTest/src/test_shapes.cc
index fdb74a01f2fee68c9ca2deb3fe1132fd9c2bd5c4..d08112987fdb35436b98228c8a7380caf134ab60 100644
--- a/DDTest/src/test_shapes.cc
+++ b/DDTest/src/test_shapes.cc
@@ -19,7 +19,7 @@ int main(int /* argc */, char** /* argv */ ){
     // Polycone
 
     // add single plane with addZPlanes
-    Polycone polycone(0, 2*M_PI, {0, 0}, {1, 1}, {0, 1});
+    dd4hep::Polycone polycone(0, 2*M_PI, {0, 0}, {1, 1}, {0, 1});
     polycone.addZPlanes({0}, {1}, {0.5});
 
     // --------------------------------------------------------------------