diff --git a/Simulation/DetSimSD/src/TimeProjectionChamberSensDetTool.cpp b/Simulation/DetSimSD/src/TimeProjectionChamberSensDetTool.cpp
index 511b2b18007ae3c21cd086d16d9d608748f80572..9ca7b471af8832494703c9fab48febd49e72d6df 100644
--- a/Simulation/DetSimSD/src/TimeProjectionChamberSensDetTool.cpp
+++ b/Simulation/DetSimSD/src/TimeProjectionChamberSensDetTool.cpp
@@ -31,7 +31,7 @@ StatusCode TimeProjectionChamberSensDetTool::finalize() {
 }
 
 G4VSensitiveDetector* TimeProjectionChamberSensDetTool::createSD(const std::string& name) {
-  debug() << "createSD" << endmsg;
+  debug() << "createSD for TPC" << endmsg;
   
   dd4hep::Detector* dd4hep_geo = m_geosvc->lcdd();