diff --git a/src/Mod/Assembly/App/BomObject.cpp b/src/Mod/Assembly/App/BomObject.cpp
index 0353cee2e1..ca75e95e18 100644
--- a/src/Mod/Assembly/App/BomObject.cpp
+++ b/src/Mod/Assembly/App/BomObject.cpp
@@ -263,7 +263,7 @@ void BomObject::addObjectToBom(App::DocumentObject* obj, size_t row, std::string
     }
 }
 
-std::string BomObject::getBomPropertyValue(App::DocumentObject* obj, std::string baseName)
+std::string BomObject::getBomPropertyValue(App::DocumentObject* obj, const std::string& baseName)
 {
     App::Property* prop = obj->getPropertyByName(baseName.c_str());
 
diff --git a/src/Mod/Assembly/App/BomObject.h b/src/Mod/Assembly/App/BomObject.h
index e93cae4188..7d0950830d 100644
--- a/src/Mod/Assembly/App/BomObject.h
+++ b/src/Mod/Assembly/App/BomObject.h
@@ -96,7 +96,7 @@ public:
     std::vector<App::DocumentObject*> obj_list;
 
 private:
-    std::string getBomPropertyValue(App::DocumentObject* obj, std::string baseName);
+    std::string getBomPropertyValue(App::DocumentObject* obj, const std::string& baseName);
 };