diff --git a/QuestValidator/Program.cs b/QuestValidator/Program.cs
index 11c776c..f0f92a0 100644
--- a/QuestValidator/Program.cs
+++ b/QuestValidator/Program.cs
@@ -456,7 +456,10 @@ namespace QuestValidator
                 CheckValuesMatch(availableForFinishItem._props.parentId, liveFinishItem._props.parentId, "AvailableForFinish parentId mismatch", availableForFinishItem._props.id);
 
                 // check AvailableForFinish resetOnSessionEnd
+                if (availableForFinishItem._props.resetOnSessionEnd.HasValue && liveFinishItem._props.resetOnSessionEnd.HasValue)
+                {
                     CheckValuesMatch(availableForFinishItem._props.resetOnSessionEnd.Value, liveFinishItem._props.resetOnSessionEnd.Value, "AvailableForFinish resetOnSessionEnd value mismatch", availableForFinishItem._props.id);
+                }
 
                 // check AvailableForFinish target
                 CheckValuesMatch(Convert.ToString(availableForFinishItem._props.target), Convert.ToString(liveFinishItem._props.target), "AvailableForFinish target value mismatch", availableForFinishItem._props.id);