diff --git a/src/rust.rs b/src/rust.rs
index c7012b863..d7eb1ab6e 100644
--- a/src/rust.rs
+++ b/src/rust.rs
@@ -400,11 +400,11 @@ macro_rules! rooted {
     };
     (in($cx:expr) let $name:ident: $type:ty) => {
         let mut __root = $crate::jsapi::Rooted::new_unrooted();
-        let $name = $crate::rust::RootedGuard::new($cx, &mut __root, $type::default());
+        let $name = $crate::rust::RootedGuard::new($cx, &mut __root, <$type as $crate::rust::GCMethods>::initial());
     };
     (in($cx:expr) let mut $name:ident: $type:ty) => {
         let mut __root = $crate::jsapi::Rooted::new_unrooted();
-        let mut $name = $crate::rust::RootedGuard::new($cx, &mut __root, $type::default());
+        let mut $name = $crate::rust::RootedGuard::new($cx, &mut __root, <$type as $crate::rust::GCMethods>::initial());
     };
 }
 
diff --git a/tests/rooting.rs b/tests/rooting.rs
index b2f558094..7a109bea3 100644
--- a/tests/rooting.rs
+++ b/tests/rooting.rs
@@ -21,6 +21,8 @@ use mozjs::jsapi::JSPROP_ENUMERATE;
 use mozjs::jsapi::JS_SetGCZeal;
 use mozjs::jsapi::OnNewGlobalHookOption;
 use mozjs::jsapi::Value;
+use mozjs::jsapi::{JSObject, JSString, JSFunction};
+use mozjs::jsval::JSVal;
 use mozjs::rust::{Runtime, SIMPLE_GLOBAL_CLASS, define_methods};
 use std::ptr;
 
@@ -45,6 +47,18 @@ fn rooting() {
                                                               &CLASS as *const _,
                                                               prototype_proto.handle().into()));
         define_methods(cx, proto.handle(), METHODS).unwrap();
+
+        rooted!(in(cx) let root : JSVal);
+        assert_eq!(root.get().is_undefined(), true);
+
+        rooted!(in(cx) let root : *mut JSObject);
+        assert_eq!(root.get().is_null(), true);
+
+        rooted!(in(cx) let root : *mut JSString);
+        assert_eq!(root.get().is_null(), true);
+
+        rooted!(in(cx) let root : *mut JSFunction);
+        assert_eq!(root.get().is_null(), true);
     }
 }