diff --git a/segmentation/include/pcl/segmentation/impl/organized_connected_component_segmentation.hpp b/segmentation/include/pcl/segmentation/impl/organized_connected_component_segmentation.hpp
index f02b769ab7d..76b6245f974 100644
--- a/segmentation/include/pcl/segmentation/impl/organized_connected_component_segmentation.hpp
+++ b/segmentation/include/pcl/segmentation/impl/organized_connected_component_segmentation.hpp
@@ -182,7 +182,7 @@ pcl::OrganizedConnectedComponentSegmentation<PointT, PointLT>::segment (pcl::Poi
         {
           if (labels[current_row + colIdx].label == invalid_label)
             labels[current_row + colIdx].label = labels[previous_row + colIdx].label;
-          else
+          else if (labels[previous_row + colIdx].label != invalid_label)
           {
             unsigned root1 = findRoot (run_ids, labels[current_row + colIdx].label);
             unsigned root2 = findRoot (run_ids, labels[previous_row + colIdx].label);