diff --git a/gfx/src/ArrayView.h b/gfx/src/ArrayView.h
index 0c45c4b96f0c..9734c10c13b8 100644
--- a/gfx/src/ArrayView.h
+++ b/gfx/src/ArrayView.h
@@ -15,7 +15,7 @@ template<typename T>
 class ArrayView
 {
     public:
-        ArrayView(const nsTArray<T>& aData) :
+        MOZ_IMPLICIT ArrayView(const nsTArray<T>& aData) :
             mData(aData.Elements()), mLength(aData.Length())
         {
         }