diff --git a/ApplicationCode/ReservoirDataModel/RigEclipseCaseData.h b/ApplicationCode/ReservoirDataModel/RigEclipseCaseData.h
index c856065247..ce1117cb97 100644
--- a/ApplicationCode/ReservoirDataModel/RigEclipseCaseData.h
+++ b/ApplicationCode/ReservoirDataModel/RigEclipseCaseData.h
@@ -34,6 +34,7 @@
 #include "cvfCollection.h"
 
 #include <vector>
+#include <map>
 
 class RigCaseCellResultsData;
 class RigFormationNames;