diff --git a/examples/SimpleDetector/src/AirTube_geo.cpp b/examples/SimpleDetector/src/AirTube_geo.cpp
index 2ec90cf21cd112b1765cc21db75e090161024a3d..b3c431edb0bdbf96ef5640f6348703c5ae0ad1ab 100644
--- a/examples/SimpleDetector/src/AirTube_geo.cpp
+++ b/examples/SimpleDetector/src/AirTube_geo.cpp
@@ -17,7 +17,6 @@
 using namespace dd4hep;
 using namespace dd4hep::detail;
 using namespace dd4hep::rec ;
-using namespace DDSurfaces ;
 
 static Ref_t create_element(Detector& description, xml_h e, SensitiveDetector /* sens */)  {
   
diff --git a/examples/SimpleDetector/src/ZPlanarTracker_geo.cpp b/examples/SimpleDetector/src/ZPlanarTracker_geo.cpp
index 8a263d4cbe642dfa9957a56691c9713f0a811778..dc4a30488bade9d96f00041e0ea7e6cfb1b7c8f9 100644
--- a/examples/SimpleDetector/src/ZPlanarTracker_geo.cpp
+++ b/examples/SimpleDetector/src/ZPlanarTracker_geo.cpp
@@ -17,7 +17,6 @@
 using namespace dd4hep;
 using namespace dd4hep::detail;
 using namespace dd4hep::rec ;
-using namespace DDSurfaces ;
 
 static Ref_t create_element(Detector& description, xml_h e, SensitiveDetector sens)  {