diff --git a/apps/opencs/model/world/idtableproxymodel.cpp b/apps/opencs/model/world/idtableproxymodel.cpp
index 5166447138..1f8f2e4b4e 100644
--- a/apps/opencs/model/world/idtableproxymodel.cpp
+++ b/apps/opencs/model/world/idtableproxymodel.cpp
@@ -60,6 +60,20 @@ void CSMWorld::IdTableProxyModel::setFilter (const boost::shared_ptr<CSMFilter::
 
 bool CSMWorld::IdTableProxyModel::lessThan(const QModelIndex &left, const QModelIndex &right) const
 {
+    Columns::ColumnId id = static_cast<Columns::ColumnId>(left.data(ColumnBase::Role_ColumnId).toInt());
+    EnumColumnCache::const_iterator valuesIt = mEnumColumnCache.find(id);
+    if (valuesIt == mEnumColumnCache.end())
+    {
+        if (Columns::hasEnums(id))
+        {
+            valuesIt = mEnumColumnCache.insert(std::make_pair(id, Columns::getEnums(id))).first;
+        }
+    }
+
+    if (valuesIt != mEnumColumnCache.end())
+    {
+        return valuesIt->second[left.data().toInt()] < valuesIt->second[right.data().toInt()];
+    }
     return QSortFilterProxyModel::lessThan(left, right);
 }
 
diff --git a/apps/opencs/model/world/idtableproxymodel.hpp b/apps/opencs/model/world/idtableproxymodel.hpp
index d2a2405291..decad157c4 100644
--- a/apps/opencs/model/world/idtableproxymodel.hpp
+++ b/apps/opencs/model/world/idtableproxymodel.hpp
@@ -11,6 +11,8 @@
 
 #include "../filter/node.hpp"
 
+#include "columns.hpp"
+
 namespace CSMWorld
 {
     class IdTableProxyModel : public QSortFilterProxyModel
@@ -20,6 +22,11 @@ namespace CSMWorld
             boost::shared_ptr<CSMFilter::Node> mFilter;
             std::map<int, int> mColumnMap; // column ID, column index in this model (or -1)
 
+            // Cache of enum values for enum columns (e.g. Modified, Record Type).
+            // Used to speed up comparisons during the sort by such columns.
+            typedef std::map<Columns::ColumnId, std::vector<std::string> > EnumColumnCache;
+            mutable EnumColumnCache mEnumColumnCache;
+
         private:
 
             void updateColumnMap();