diff --git a/Source/WebCore/dom/ScriptedAnimationController.h b/Source/WebCore/dom/ScriptedAnimationController.h
index 7ab8ec14a007b..c0093f41cb8ed 100644
--- a/Source/WebCore/dom/ScriptedAnimationController.h
+++ b/Source/WebCore/dom/ScriptedAnimationController.h
@@ -93,7 +93,7 @@ class ScriptedAnimationController : public RefCounted<ScriptedAnimationControlle
 
 #if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
     OptionSet<ThrottlingReason> m_throttlingReasons;
-    bool m_isUsingTimer { false };
+    bool m_isUsingTimer { true };
 #endif
 };