1 files changed, 3 insertions, 3 deletions
diff --git a/components/script/docs/JS-Servos-only-GC.md b/components/script/docs/JS-Servos-only-GC.md
index e7237853217..c8129241a84 100644
--- a/components/script/docs/JS-Servos-only-GC.md
+++ b/components/script/docs/JS-Servos-only-GC.md
@@ -122,8 +122,8 @@ which has an area, and the trait provides a way to get that object's area.
 Now let's look at the `JSTraceable` trait, which we use for tracing:
 
 ```rust
-pub trait JSTraceable {
-    fn trace(&self, trc: *mut JSTracer);
+pub unsafe trait JSTraceable {
+    unsafe fn trace(&self, trc: *mut JSTracer);
 }
 ```
 
@@ -182,7 +182,7 @@ pub fn trace_reflector(tracer: *mut JSTracer, description: &str, reflector: &Ref
 }
 
 impl<T: Reflectable> JSTraceable for JS<T> {
-    fn trace(&self, trc: *mut JSTracer) {
+    unsafe fn trace(&self, trc: *mut JSTracer) {
         trace_reflector(trc, "", unsafe { (**self.ptr).reflector() });
     }
 }