diff --git a/vtkm/cont/internal/testing/UnitTestBuffer.cxx b/vtkm/cont/internal/testing/UnitTestBuffer.cxx
index d16b5bfb6..173e309b5 100644
--- a/vtkm/cont/internal/testing/UnitTestBuffer.cxx
+++ b/vtkm/cont/internal/testing/UnitTestBuffer.cxx
@@ -25,7 +25,7 @@ using PortalTypeConst = vtkm::cont::internal::ArrayPortalFromIterators<const T*>
 
 struct TestMetaData
 {
-  vtkm::Id Value;
+  vtkm::Id Value = 0;
 };
 
 constexpr vtkm::Id METADATA_VALUE = 42;