1 files changed, 2 insertions, 2 deletions
diff --git a/widget/nsPrinterBase.h b/widget/nsPrinterBase.h
index abd4f82705..8ce1f8a90d 100644
--- a/widget/nsPrinterBase.h
+++ b/widget/nsPrinterBase.h
@@ -104,8 +104,8 @@ class nsPrinterBase : public nsIPrinter {
       const mozilla::gfx::SizeDouble& aSize) const;
 
  private:
-  mozilla::EnumeratedArray<AsyncAttribute, AsyncAttribute::Last,
-                           RefPtr<Promise>>
+  mozilla::EnumeratedArray<AsyncAttribute, RefPtr<Promise>,
+                           size_t(AsyncAttribute::Last)>
       mAsyncAttributePromises;
   // List of built-in, commonly used paper sizes.
   const RefPtr<const mozilla::CommonPaperInfoArray> mCommonPaperInfo;