diff --git a/xpcom/base/nsCycleCollector.cpp b/xpcom/base/nsCycleCollector.cpp
index df285df792d..a35ab2f5be1 100644
--- a/xpcom/base/nsCycleCollector.cpp
+++ b/xpcom/base/nsCycleCollector.cpp
@@ -135,6 +135,7 @@
 #include "mozilla/mozPoisonWrite.h"
 #include "mozilla/Mutex.h"
 #include "mozilla/Telemetry.h"
+#include "mozilla/ThreadLocal.h"
 
 using namespace mozilla;