diff --git a/src/libs/vtools/tools/vtooluniondetails.cpp b/src/libs/vtools/tools/vtooluniondetails.cpp
index 195c8814f..9dc65b5ca 100644
--- a/src/libs/vtools/tools/vtooluniondetails.cpp
+++ b/src/libs/vtools/tools/vtooluniondetails.cpp
@@ -1343,7 +1343,7 @@ void UpdateUnitedNodes(const VToolUnionDetailsInitData &initData, qreal dx, qrea
         {
             const auto unitedPath = VToolUnionDetails::CalcUnitedPath(d1REPath, d2REPath, initData.indexD2, pRotate);
 
-            for (auto path : unitedPath)
+            for (auto &path : unitedPath)
             {
                 if (path.first)
                 {// first piece