diff --git a/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp b/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp
index aeae106153b1f6e4fc2779f30981a034a786d935..0ff3f3e8745fa46d2aadc3be950caef0c1d97212 100644
--- a/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp
+++ b/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp
@@ -15,6 +15,8 @@
 #include <cassert>
 
 #include "LiquidFlowLocalAssembler.h"
+#include "MathLib/LinAlg/FinalizeMatrixAssembly.h"
+#include "MathLib/LinAlg/FinalizeVectorAssembly.h"
 #include "MeshLib/PropertyVector.h"
 #include "ProcessLib/Utils/ComputeResiduum.h"
 #include "ProcessLib/Utils/CreateLocalAssemblers.h"