diff --git a/ProcessLib/Output/ProcessOutput.cpp b/ProcessLib/Output/ProcessOutput.cpp
index d34ed006228cec6ef273e71afd615a2bd64e9bfa..3abd7caf1c0da6ac3482e4d45170e6ef1d4357a0 100644
--- a/ProcessLib/Output/ProcessOutput.cpp
+++ b/ProcessLib/Output/ProcessOutput.cpp
@@ -18,7 +18,6 @@
 
 #include "InfoLib/GitInfo.h"
 #include "IntegrationPointWriter.h"
-#include "MathLib/LinAlg/LinAlg.h"
 #ifdef USE_PETSC
 #include "MeshLib/NodePartitionedMesh.h"
 #endif