diff --git a/CEP/DP3/DPPP/include/DPPP/CMakeLists.txt b/CEP/DP3/DPPP/include/DPPP/CMakeLists.txt
index a0811414c3efb32e39b96d4709b073c0f04090fd..c92e64372dfee92abe459266e5f3c0cb4fc91f8a 100644
--- a/CEP/DP3/DPPP/include/DPPP/CMakeLists.txt
+++ b/CEP/DP3/DPPP/include/DPPP/CMakeLists.txt
@@ -16,7 +16,7 @@ set(inst_HEADERS
   DemixerNew.h DemixInfo.h DemixWorker.h
   ApplyBeam.h ApplyBeam.tcc
   Predict.h
-  GainCal.h StefCal.cc
+  GainCal.h StefCal.h
 )
 
 # Create symbolic link to include directory.