diff --git a/Detector/DetDriftChamber/CMakeLists.txt b/Detector/DetDriftChamber/CMakeLists.txt
index 70a29ad77..fbf8e01ce 100644
--- a/Detector/DetDriftChamber/CMakeLists.txt
+++ b/Detector/DetDriftChamber/CMakeLists.txt
@@ -16,7 +16,6 @@ find_package(ROOT COMPONENTS MathCore GenVector Geom REQUIRED)
 
 gaudi_add_module(DetDriftChamber
                  SOURCES src/driftchamber/DriftChamber.cpp
-                 SOURCES src/driftchamber/DriftChamber_stero.cpp
 		 LINK DetSegmentation
                       ${DD4hep_COMPONENT_LIBRARIES} 
                   # ROOT Geant4