diff --git a/examples/DDCMS/src/plugins/DDEcalEndcapAlgo.cpp b/examples/DDCMS/src/plugins/DDEcalEndcapAlgo.cpp
index d718c4301829c4505a75d13f7efa8ff6fa2266ec..7c7d1158887ff7c65670f14acf6d2297750d6f66 100644
--- a/examples/DDCMS/src/plugins/DDEcalEndcapAlgo.cpp
+++ b/examples/DDCMS/src/plugins/DDEcalEndcapAlgo.cpp
@@ -13,6 +13,13 @@
 #include <string>
 #include <vector>
 
+using namespace std;
+using namespace cms;
+using namespace dd4hep;
+
+using DDTranslation = ROOT::Math::DisplacementVector3D<ROOT::Math::Cartesian3D<double> >;
+using DDRotation = ROOT::Math::Rotation3D;
+
 // Define Endcap Supercrystal class
 
 class DDEcalEndcapTrap {
@@ -311,14 +318,6 @@ void DDEcalEndcapTrap::print() {
   }
 }
 
-using namespace std;
-using namespace cms;
-using namespace dd4hep;
-using namespace cms_units::operators;
-
-using DDTranslation = ROOT::Math::DisplacementVector3D<ROOT::Math::Cartesian3D<double> >;
-using DDRotation = ROOT::Math::Rotation3D;
-
 namespace {
   struct Endcap {
     string mat;