diff --git a/src/BuildingRegistry/AllStream/Commands/CreateOsloSnapshots.cs b/src/BuildingRegistry/AllStream/Commands/CreateOsloSnapshots.cs
index f31c7a83e..d510f32f5 100644
--- a/src/BuildingRegistry/AllStream/Commands/CreateOsloSnapshots.cs
+++ b/src/BuildingRegistry/AllStream/Commands/CreateOsloSnapshots.cs
@@ -35,8 +35,15 @@ public Guid CreateCommandId()
 
         private IEnumerable<object> IdentityFields()
         {
-            yield return BuildingPersistentLocalIds;
-            yield return BuildingUnitPersistentLocalIds;
+            foreach (var id in BuildingPersistentLocalIds)
+            {
+                yield return id;
+            }
+
+            foreach (var id in BuildingUnitPersistentLocalIds)
+            {
+                yield return id;
+            }
 
             foreach (var field in Provenance.GetIdentityFields())
             {