--- a/src/hotspot/share/jfr/periodic/sampling/jfrThreadSampler.cpp	Tue Aug 28 14:45:34 2018 -0400
+++ b/src/hotspot/share/jfr/periodic/sampling/jfrThreadSampler.cpp	Tue Aug 28 16:04:54 2018 -0400
@@ -308,7 +308,7 @@
   _added_native(0) {
 }
 
-class JfrThreadSampler : public Thread {
+class JfrThreadSampler : public NonJavaThread {
   friend class JfrThreadSampling;
  private:
   Semaphore _sample;