diff --git a/CMakeLists_files.cmake b/CMakeLists_files.cmake
index 88741b1da..0719d0efa 100644
--- a/CMakeLists_files.cmake
+++ b/CMakeLists_files.cmake
@@ -66,8 +66,6 @@ list (APPEND MAIN_SOURCE_FILES
   opm/simulators/utils/PartiallySupportedFlowKeywords.cpp
   opm/simulators/utils/readDeck.cpp
   opm/simulators/utils/UnsupportedFlowKeywords.cpp
-  opm/simulators/utils/DamarisOutputModule.cpp
-  opm/simulators/utils/DamarisKeywords.cpp
   opm/simulators/timestepping/AdaptiveSimulatorTimer.cpp
   opm/simulators/timestepping/AdaptiveTimeSteppingEbos.cpp
   opm/simulators/timestepping/TimeStepControl.cpp
@@ -110,6 +108,10 @@ list (APPEND MAIN_SOURCE_FILES
   opm/simulators/wells/WGState.cpp
   )
 
+if (DAMARIS_FOUND)
+  list (APPEND MAIN_SOURCE_FILES opm/simulators/utils/DamarisOutputModule.cpp) 
+  list (APPEND MAIN_SOURCE_FILES opm/simulators/utils/DamarisKeywords.cpp)
+endif()
 if(CUDA_FOUND)
   list (APPEND MAIN_SOURCE_FILES opm/simulators/linalg/bda/cuda/cusparseSolverBackend.cu)
   list (APPEND MAIN_SOURCE_FILES opm/simulators/linalg/bda/cuda/cuWellContributions.cu)