diff --git a/apps/opencs/model/world/collection.hpp b/apps/opencs/model/world/collection.hpp
index 84a00cef8..5ae53e710 100644
--- a/apps/opencs/model/world/collection.hpp
+++ b/apps/opencs/model/world/collection.hpp
@@ -104,7 +104,8 @@ namespace CSMWorld
 
             virtual const Record<ESXRecordT>& getRecord (int index) const;
 
-            virtual int getAppendIndex (UniversalId::Type type = UniversalId::Type_None) const;
+            virtual int getAppendIndex (const std::string& id,
+                UniversalId::Type type = UniversalId::Type_None) const;
             ///< \param type Will be ignored, unless the collection supports multiple record types
 
             virtual std::vector<std::string> getIds (bool listDeleted = true) const;
@@ -293,7 +294,8 @@ namespace CSMWorld
     }
 
     template<typename ESXRecordT, typename IdAccessorT>
-    int Collection<ESXRecordT, IdAccessorT>::getAppendIndex (UniversalId::Type type) const
+    int Collection<ESXRecordT, IdAccessorT>::getAppendIndex (const std::string& id,
+        UniversalId::Type type) const
     {
         return static_cast<int> (mRecords.size());
     }
diff --git a/apps/opencs/model/world/collectionbase.hpp b/apps/opencs/model/world/collectionbase.hpp
index ff6dab247..8045ea543 100644
--- a/apps/opencs/model/world/collectionbase.hpp
+++ b/apps/opencs/model/world/collectionbase.hpp
@@ -76,7 +76,8 @@ namespace CSMWorld
 
             virtual const RecordBase& getRecord (int index) const = 0;
 
-            virtual int getAppendIndex (UniversalId::Type type = UniversalId::Type_None) const = 0;
+            virtual int getAppendIndex (const std::string& id,
+                UniversalId::Type type = UniversalId::Type_None) const = 0;
             ///< \param type Will be ignored, unless the collection supports multiple record types
 
             virtual std::vector<std::string> getIds (bool listDeleted = true) const = 0;
diff --git a/apps/opencs/model/world/idtable.cpp b/apps/opencs/model/world/idtable.cpp
index baaf75289..f37e3894e 100644
--- a/apps/opencs/model/world/idtable.cpp
+++ b/apps/opencs/model/world/idtable.cpp
@@ -118,7 +118,7 @@ QModelIndex CSMWorld::IdTable::parent (const QModelIndex& index) const
 
 void CSMWorld::IdTable::addRecord (const std::string& id, UniversalId::Type type)
 {
-    int index = mIdCollection->getAppendIndex();
+    int index = mIdCollection->getAppendIndex (id, type);
 
     beginInsertRows (QModelIndex(), index, index);
 
@@ -138,7 +138,7 @@ void CSMWorld::IdTable::setRecord (const std::string& id, const RecordBase& reco
 
     if (index==-1)
     {
-        int index = mIdCollection->getAppendIndex();
+        int index = mIdCollection->getAppendIndex (id);
 
         beginInsertRows (QModelIndex(), index, index);
 
diff --git a/apps/opencs/model/world/refidcollection.cpp b/apps/opencs/model/world/refidcollection.cpp
index cda2711cc..b4352ef2e 100644
--- a/apps/opencs/model/world/refidcollection.cpp
+++ b/apps/opencs/model/world/refidcollection.cpp
@@ -530,7 +530,7 @@ void CSMWorld::RefIdCollection::load (ESM::ESMReader& reader, bool base, Univers
     }
 }
 
-int CSMWorld::RefIdCollection::getAppendIndex (UniversalId::Type type) const
+int CSMWorld::RefIdCollection::getAppendIndex (const std::string& id, UniversalId::Type type) const
 {
     return mData.getAppendIndex (type);
 }
diff --git a/apps/opencs/model/world/refidcollection.hpp b/apps/opencs/model/world/refidcollection.hpp
index 22f83150d..e5e205955 100644
--- a/apps/opencs/model/world/refidcollection.hpp
+++ b/apps/opencs/model/world/refidcollection.hpp
@@ -87,7 +87,7 @@ namespace CSMWorld
 
             void load (ESM::ESMReader& reader, bool base, UniversalId::Type type);
 
-            virtual int getAppendIndex (UniversalId::Type type) const;
+            virtual int getAppendIndex (const std::string& id, UniversalId::Type type) const;
             ///< \param type Will be ignored, unless the collection supports multiple record types
 
             virtual std::vector<std::string> getIds (bool listDeleted) const;