diff --git a/Libraries/Core/Timers/JSTimers.js b/Libraries/Core/Timers/JSTimers.js
index f60a4580b375df..2b2f8dd164e3db 100644
--- a/Libraries/Core/Timers/JSTimers.js
+++ b/Libraries/Core/Timers/JSTimers.js
@@ -331,7 +331,7 @@ const JSTimers = {
             const timeoutId = requestIdleCallbackTimeouts[id];
             if (timeoutId) {
               JSTimers.clearTimeout(timeoutId);
-              requestIdleCallbackTimeouts[id];
+              delete requestIdleCallbackTimeouts[id];
             }
             return func(deadline);
           }