diff --git a/js/public/Value.h b/js/public/Value.h
index 6b1df5fd5d8..e777cd9a4d8 100644
--- a/js/public/Value.h
+++ b/js/public/Value.h
@@ -321,7 +321,7 @@ typedef union jsval_layout
             int32_t        i32;
             uint32_t       u32;
             JSWhyMagic     why;
-            jsuword        word;
+            uintptr_t      word;
         } payload;
     } s;
     double asDouble;