diff --git a/AMDiS/CMakeLists.txt b/AMDiS/CMakeLists.txt
index 548e7b3c8ec64924b2007f7dac4d77ee4e2ec6d6..d0d5947c2084218680f0a3dbd5a3feca2225843f 100644
--- a/AMDiS/CMakeLists.txt
+++ b/AMDiS/CMakeLists.txt
@@ -428,6 +428,7 @@ if(ENABLE_EXTENSIONS)
     # 	      ${EXTENSIONS_DIR}/base_problems/NavierStokes_Chorin.cc
     # 	      ${EXTENSIONS_DIR}/base_problems/NavierStokesPhase_Chorin.cc
 		  ${EXTENSIONS_DIR}/base_problems/NavierStokesPhase_TaylorHood.cc
+		  ${EXTENSIONS_DIR}/base_problems/NavierStokesCahnHilliard.cc		  
 		  ${EXTENSIONS_DIR}/base_problems/NavierStokes_TaylorHood.cc
 		  ${EXTENSIONS_DIR}/base_problems/NavierStokes_TaylorHood_RB.cc
 		  ${EXTENSIONS_DIR}/base_problems/NavierStokes_TH_MultiPhase.cc