diff --git a/third_party/blink/renderer/core/paint/fragment_data_iterator.h b/third_party/blink/renderer/core/paint/fragment_data_iterator.h
index c42fba8898..56a7a45d72 100644
--- a/third_party/blink/renderer/core/paint/fragment_data_iterator.h
+++ b/third_party/blink/renderer/core/paint/fragment_data_iterator.h
@@ -52,7 +52,7 @@ class FragmentDataIterator
  public:
   explicit FragmentDataIterator(const LayoutObject& object)
       : FragmentDataIteratorBase(&object.FirstFragment()) {}
-  explicit FragmentDataIterator(nullptr_t)
+  explicit FragmentDataIterator(std::nullptr_t)
       : FragmentDataIteratorBase(nullptr) {}
 };
 
@@ -63,7 +63,7 @@ class MutableFragmentDataIterator
   explicit MutableFragmentDataIterator(const LayoutObject& object)
       : FragmentDataIteratorBase(
             &object.GetMutableForPainting().FirstFragment()) {}
-  explicit MutableFragmentDataIterator(nullptr_t)
+  explicit MutableFragmentDataIterator(std::nullptr_t)
       : FragmentDataIteratorBase(nullptr) {}
 };