diff --git a/ApplicationCode/ReservoirDataModel/RigActiveCellsResultAccessObject.cpp b/ApplicationCode/ReservoirDataModel/RigActiveCellsResultAccessObject.cpp
index 3cfddaf58f..6552f938f7 100644
--- a/ApplicationCode/ReservoirDataModel/RigActiveCellsResultAccessObject.cpp
+++ b/ApplicationCode/ReservoirDataModel/RigActiveCellsResultAccessObject.cpp
@@ -21,6 +21,9 @@
 #include "RigGridBase.h"
 #include "RigActiveCellInfo.h"
 
+#include <cmath>
+
+
 RigActiveCellsResultAccessObject::RigActiveCellsResultAccessObject(const RigGridBase* grid, std::vector<double>* reservoirResultValues, const RigActiveCellInfo* activeCellInfo, const QString& resultName)
     : m_grid(grid),
     m_reservoirResultValues(reservoirResultValues),
diff --git a/ApplicationCode/ReservoirDataModel/RigAllGridCellsResultAccessObject.cpp b/ApplicationCode/ReservoirDataModel/RigAllGridCellsResultAccessObject.cpp
index 1d7b0ff8f1..37eaa0ffa6 100644
--- a/ApplicationCode/ReservoirDataModel/RigAllGridCellsResultAccessObject.cpp
+++ b/ApplicationCode/ReservoirDataModel/RigAllGridCellsResultAccessObject.cpp
@@ -20,6 +20,8 @@
 
 #include "RigGridBase.h"
 
+#include <cmath>
+
 
 //--------------------------------------------------------------------------------------------------
 ///