diff --git a/ApplicationCode/ReservoirDataModel/RigCaseCellResultsData.cpp b/ApplicationCode/ReservoirDataModel/RigCaseCellResultsData.cpp
index d6f363f4cd..948cdc0059 100644
--- a/ApplicationCode/ReservoirDataModel/RigCaseCellResultsData.cpp
+++ b/ApplicationCode/ReservoirDataModel/RigCaseCellResultsData.cpp
@@ -2808,7 +2808,9 @@ void RigCaseCellResultsData::assignValuesToTemporaryLgrs(const QString&       re
 //--------------------------------------------------------------------------------------------------
 RigStatisticsDataCache* RigCaseCellResultsData::statistics(const RigEclipseResultAddress& resVarAddr)
 {
-    return m_statisticsDataCache[findScalarResultIndexFromAddress(resVarAddr)].p();
+    size_t scalarResultIndex = findScalarResultIndexFromAddress(resVarAddr);
+    CAF_ASSERT(scalarResultIndex < m_statisticsDataCache.size());
+    return m_statisticsDataCache[scalarResultIndex].p();
 }