diff --git a/js/xpconnect/src/XPCInlines.h b/js/xpconnect/src/XPCInlines.h
index ece9f72c2938..7c090ab21af7 100644
--- a/js/xpconnect/src/XPCInlines.h
+++ b/js/xpconnect/src/XPCInlines.h
@@ -521,6 +521,7 @@ void XPCWrappedNativeTearOff::JSObjectMoved(JSObject *obj, const JSObject *old)
 inline
 XPCWrappedNativeTearOff::~XPCWrappedNativeTearOff()
 {
+    MOZ_COUNT_DTOR(XPCWrappedNativeTearOff);
     MOZ_ASSERT(!(GetInterface() || GetNative() || GetJSObjectPreserveColor()),
                "tearoff not empty in dtor");
 }
diff --git a/js/xpconnect/src/xpcprivate.h b/js/xpconnect/src/xpcprivate.h
index 6c44193a5b96..fa089f58ef6b 100644
--- a/js/xpconnect/src/xpcprivate.h
+++ b/js/xpconnect/src/xpcprivate.h
@@ -1961,7 +1961,10 @@ public:
     void JSObjectMoved(JSObject *obj, const JSObject *old);
 
     XPCWrappedNativeTearOff()
-        : mInterface(nullptr), mJSObject(nullptr) {}
+        : mInterface(nullptr), mJSObject(nullptr)
+    {
+        MOZ_COUNT_CTOR(XPCWrappedNativeTearOff);
+    }
     ~XPCWrappedNativeTearOff();
 
     // NOP. This is just here to make the AutoMarkingPtr code compile.