diff --git a/apps/opencs/model/world/collection.hpp b/apps/opencs/model/world/collection.hpp
index 16f5ce51f4..a136734612 100644
--- a/apps/opencs/model/world/collection.hpp
+++ b/apps/opencs/model/world/collection.hpp
@@ -443,19 +443,24 @@ namespace CSMWorld
     void Collection<ESXRecordT, IdAccessorT>::insertRecord (const RecordBase& record, int index,
         UniversalId::Type type)
     {
-        if (index<0 || index>static_cast<int> (mRecords.size()))
+        int size = static_cast<int>(mRecords.size());
+        if (index < 0 || index > size)
             throw std::runtime_error ("index out of range");
 
         const Record<ESXRecordT>& record2 = dynamic_cast<const Record<ESXRecordT>&> (record);
 
-        mRecords.insert (mRecords.begin()+index, record2);
+        if (index == size)
+            mRecords.push_back (record2);
+        else
+            mRecords.insert (mRecords.begin()+index, record2);
 
-        if (index<static_cast<int> (mRecords.size())-1)
+        if (index < size-1)
         {
-            for (std::map<std::string, int>::iterator iter (mIndex.begin()); iter!=mIndex.end();
-                ++iter)
-                 if (iter->second>=index)
-                     ++(iter->second);
+            for (std::map<std::string, int>::iterator iter (mIndex.begin()); iter!=mIndex.end(); ++iter)
+            {
+                if (iter->second >= index)
+                    ++(iter->second);
+            }
         }
 
         mIndex.insert (std::make_pair (Misc::StringUtils::lowerCase (IdAccessorT().getId (