diff --git a/src/hotspot/share/jfr/support/jfrThreadLocal.cpp b/src/hotspot/share/jfr/support/jfrThreadLocal.cpp
index 4b805a98a32..67d311e2a6e 100644
--- a/src/hotspot/share/jfr/support/jfrThreadLocal.cpp
+++ b/src/hotspot/share/jfr/support/jfrThreadLocal.cpp
@@ -79,7 +79,8 @@ JfrThreadLocal::JfrThreadLocal() :
   _enqueued_requests(false),
   _vthread(false),
   _notified(false),
-  _dead(false)
+  _dead(false),
+  _sampling_critical_section(false)
 #ifdef LINUX
   ,_cpu_timer(nullptr),
   _cpu_time_jfr_locked(UNLOCKED),