diff --git a/js/src/gc/Barrier.h b/js/src/gc/Barrier.h
index eb5153a41dfe..3d018ded5c67 100644
--- a/js/src/gc/Barrier.h
+++ b/js/src/gc/Barrier.h
@@ -844,7 +844,7 @@ static inline void BarrieredSetPair(Zone* zone, HeapPtr<T1*>& v1, T1* val1,
  * class!
  */
 template <typename T>
-class ImmutableTenuredPtr {
+class MOZ_HEAP_CLASS ImmutableTenuredPtr {
   T value;
 
  public:
diff --git a/js/src/wasm/AsmJS.cpp b/js/src/wasm/AsmJS.cpp
index 32a5aa3b5292..4eb9fb048bb3 100644
--- a/js/src/wasm/AsmJS.cpp
+++ b/js/src/wasm/AsmJS.cpp
@@ -6476,7 +6476,7 @@ static bool GetDataProperty(JSContext* cx, HandleValue objVal,
 }
 
 static bool GetDataProperty(JSContext* cx, HandleValue objVal,
-                            ImmutablePropertyNamePtr field,
+                            const ImmutablePropertyNamePtr& field,
                             MutableHandleValue v) {
   // Help the conversion along for all the cx->names().* users.
   HandlePropertyName fieldHandle = field;