diff --git a/vtkm/cont/CellSet.h b/vtkm/cont/CellSet.h
index a0688c683..a10ee9beb 100644
--- a/vtkm/cont/CellSet.h
+++ b/vtkm/cont/CellSet.h
@@ -85,9 +85,7 @@ public:
     return 0;
   }
 
-  // A cell set does not (necessarily) know the number of points. Nor does a
-  // DataSet. Shouldn't someone know?
-//  virtual vtkm::Id GetNumberOfPoints() const = 0;
+  virtual vtkm::Id GetNumberOfPoints() const = 0;
 
   virtual void PrintSummary(std::ostream&) const = 0;
 
diff --git a/vtkm/cont/CellSetPermutation.h b/vtkm/cont/CellSetPermutation.h
index 967eb28fb..3c6465c99 100644
--- a/vtkm/cont/CellSetPermutation.h
+++ b/vtkm/cont/CellSetPermutation.h
@@ -189,6 +189,12 @@ public:
     return this->PermutedCellSet.GetNumberOfCells();
   }
 
+  VTKM_CONT_EXPORT
+  vtkm::Id GetNumberOfPoints() const
+  {
+    return this->PermutedCellSet.GetNumberOfPoints();
+  }
+
   VTKM_CONT_EXPORT
   vtkm::Id GetSchedulingRange(vtkm::TopologyElementTagCell) const
   {
@@ -266,6 +272,12 @@ public:
     return this->ValidCellIds.GetNumberOfValues();
   }
 
+  VTKM_CONT_EXPORT
+  vtkm::Id GetNumberOfPoints() const
+  {
+    return this->FullCellSet.GetNumberOfPoints();
+  }
+
   //This is the way you can fill the memory from another system without copying
   VTKM_CONT_EXPORT
   void Fill(const ValidCellArrayHandleType &validCellIds,