diff --git a/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.cpp b/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.cpp
index 56474ef154..0a4663dd9c 100644
--- a/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.cpp
+++ b/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.cpp
@@ -20,7 +20,7 @@
 #include "RimSummaryCurve.h"
 #include "cvfVector3.h"
 
-
+#include <cmath>
 
 //--------------------------------------------------------------------------------------------------
 /// 
@@ -212,7 +212,7 @@ cvf::Color3f RimCurveLookCalculator::gradeColor(const cvf::Color3f& color, float
         targetC = cvf::Vec3f(1, 1, 1);
     }
 
-    cvf::Vec3f newColor = fabs(factor) * (targetC - orgC) + orgC;
+    cvf::Vec3f newColor = ((float)fabs(factor)) * (targetC - orgC) + orgC;
 
     return cvf::Color3f(newColor[0], newColor[1], newColor[2]);
 }
diff --git a/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.h b/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.h
index 6c81064d33..f0ef8b56d5 100644
--- a/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.h
+++ b/ApplicationCode/ProjectDataModel/RimCurveAppearanceCalculator.h
@@ -16,6 +16,7 @@
 //
 /////////////////////////////////////////////////////////////////////////////////
 #pragma once
+#include "cvfBase.h"
 #include "cvfColor3.h"
 #include <set>
 #include "RifEclipseSummaryAddress.h"