diff --git a/apps/opencs/model/world/columnimp.cpp b/apps/opencs/model/world/columnimp.cpp
index 89190023c6..215e4c3dfc 100644
--- a/apps/opencs/model/world/columnimp.cpp
+++ b/apps/opencs/model/world/columnimp.cpp
@@ -344,7 +344,7 @@ namespace CSMWorld
         QStringList selectionInfo;
         const std::vector<std::string>& instances = record.get().selectedInstances;
 
-        for (std::string instance : instances)
+        for (const std::string& instance : instances)
             selectionInfo << QString::fromStdString(instance);
         data.setValue(selectionInfo);