diff --git a/src/darwin/Framework/CHIP/MTRDevice_Concrete.mm b/src/darwin/Framework/CHIP/MTRDevice_Concrete.mm
index 19ca96c6d1201f..b2f39837eba14a 100644
--- a/src/darwin/Framework/CHIP/MTRDevice_Concrete.mm
+++ b/src/darwin/Framework/CHIP/MTRDevice_Concrete.mm
@@ -1072,6 +1072,7 @@ - (void)_triggerResubscribeWithReason:(NSString *)reason nodeLikelyReachable:(BO
     // The subscription reattempt here eventually asyncs onto the matter queue for session,
     // and should be called after the above ReleaseSession call, to avoid churn.
     if (shouldReattemptSubscription) {
+        std::lock_guard lock(_lock);
         [self _reattemptSubscriptionNowIfNeededWithReason:reason];
     }
 }