1 files changed, 3 insertions, 4 deletions
diff --git a/js/src/gc/GCMarker.h b/js/src/gc/GCMarker.h
index 2d47349794..9d34d0a0dc 100644
--- a/js/src/gc/GCMarker.h
+++ b/js/src/gc/GCMarker.h
@@ -156,11 +156,10 @@ class MarkStack {
   MarkStack();
   ~MarkStack();
 
-  explicit MarkStack(const MarkStack& other);
-  MarkStack& operator=(const MarkStack& other);
+  MarkStack(const MarkStack& other) = delete;
+  MarkStack& operator=(const MarkStack& other) = delete;
 
-  MarkStack(MarkStack&& other) noexcept;
-  MarkStack& operator=(MarkStack&& other) noexcept;
+  void swap(MarkStack& other);
 
   // The unit for MarkStack::capacity() is mark stack words.
   size_t capacity() { return stack().length(); }