diff --git a/src/scheduler/worker.rs b/src/scheduler/worker.rs
index 9bb9ca6443..db640a35ce 100644
--- a/src/scheduler/worker.rs
+++ b/src/scheduler/worker.rs
@@ -384,6 +384,7 @@ impl<VM: VMBinding> GCWorker<VM> {
             #[allow(unused_variables)]
             let typename = work.get_type_name();
             probe!(mmtk, work, typename.as_ptr(), typename.len());
+            //probe!(mmtk, work, typename.as_ptr(), typename.len(), *(typename.as_ptr()) as usize);
             work.do_work_with_stat(self, mmtk);
         }
     }
diff --git a/tools/tracing/timeline/capture.bt b/tools/tracing/timeline/capture.bt
index 99366e3f3b..0a61f42488 100644
--- a/tools/tracing/timeline/capture.bt
+++ b/tools/tracing/timeline/capture.bt
@@ -60,8 +60,8 @@ usdt:$MMTK:mmtk:work_poll {
 
 usdt:$MMTK:mmtk:work {
     @thread_in_work[tid] = 1;
-    if (!(@decoded[arg0]) && @gc_count >= 2) {
-        @type_name[arg0] = str(arg0, arg1);
+    if (!@decoded[arg0]) {
+        @type_name[arg0] = str(uptr(arg0), arg1);
         @decoded[arg0] = 1;
     }
     @thread_work_id[tid] = arg0;