diff --git a/Modules/Segmentation/Conversion/include/otbLabelImageSmallRegionMergingFilter.hxx b/Modules/Segmentation/Conversion/include/otbLabelImageSmallRegionMergingFilter.hxx
index 5d96c9aca615c07cb76f617f8846f5ffca00b762..a38536377486589e151ed48db2dd154c0aea2ba6 100644
--- a/Modules/Segmentation/Conversion/include/otbLabelImageSmallRegionMergingFilter.hxx
+++ b/Modules/Segmentation/Conversion/include/otbLabelImageSmallRegionMergingFilter.hxx
@@ -121,7 +121,7 @@ PersistentLabelImageSmallRegionMergingFilter< TInputLabelImage >
     InputLabelType closestNeighbour = label;
     auto const& statsLabel = m_LabelStatistic[ label ];
     
-    for (auto neighbour : neighbours.second)
+    for (auto const & neighbour : neighbours.second)
       {
       auto const & statsNeighbour = m_LabelStatistic[ neighbour ];
       assert( statsLabel.Size() == statsNeighbour.Size() );