From 749232665b5df4ff7011299217fe11e83ee44b0b Mon Sep 17 00:00:00 2001
From: "Gunther H. Weber" <GHWeber@lbl.gov>
Date: Thu, 17 Jun 2021 10:54:54 -0700
Subject: [PATCH] Added missing const qualifier

---
 vtkm/worklet/contourtree_augmented/meshtypes/ContourTreeMesh.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vtkm/worklet/contourtree_augmented/meshtypes/ContourTreeMesh.h b/vtkm/worklet/contourtree_augmented/meshtypes/ContourTreeMesh.h
index 7c43d5cb6..3e79155bc 100644
--- a/vtkm/worklet/contourtree_augmented/meshtypes/ContourTreeMesh.h
+++ b/vtkm/worklet/contourtree_augmented/meshtypes/ContourTreeMesh.h
@@ -735,7 +735,7 @@ inline void ContourTreeMesh<FieldType>::MergeWith(ContourTreeMesh<FieldType>& ot
   // ... helper function, basically negates criterion for CopyIf
   struct IsUnique
   {
-    VTKM_EXEC_CONT bool operator()(vtkm::IdComponent isInOther) { return isInOther == 0; }
+    VTKM_EXEC_CONT bool operator()(vtkm::IdComponent isInOther) const { return isInOther == 0; }
   };
 
   IdArrayType indicesThisUnique, indicesThisDuplicate;