diff --git a/apps/openmw/mwworld/ptrregistry.hpp b/apps/openmw/mwworld/ptrregistry.hpp
index 4ecde7b52f..9acb3df3ca 100644
--- a/apps/openmw/mwworld/ptrregistry.hpp
+++ b/apps/openmw/mwworld/ptrregistry.hpp
@@ -34,7 +34,7 @@ namespace MWWorld
         {
             mIndex.clear();
             mLastGenerated = ESM::RefNum{};
-            mRevision = 0;
+            ++mRevision;
         }
 
         void insert(const Ptr& ptr)