diff --git a/src/libraries/System.Private.CoreLib/src/System/Threading/ThreadPool.Browser.cs b/src/libraries/System.Private.CoreLib/src/System/Threading/ThreadPool.Browser.cs
index 8b07e1b1aebb9a..5250e1df5f1ab9 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Threading/ThreadPool.Browser.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Threading/ThreadPool.Browser.cs
@@ -77,6 +77,7 @@ public static void GetAvailableThreads(out int workerThreads, out int completion
 
         public static long CompletedWorkItemCount => 0;
 
+        [DynamicDependency("BackgroundJobHandler")] // https://github.com/dotnet/runtime/issues/101434
         internal static unsafe void RequestWorkerThread()
         {
             if (_callbackQueued)
diff --git a/src/libraries/System.Private.CoreLib/src/System/Threading/TimerQueue.Browser.cs b/src/libraries/System.Private.CoreLib/src/System/Threading/TimerQueue.Browser.cs
index 78157e57924637..db03ddf5731934 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Threading/TimerQueue.Browser.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Threading/TimerQueue.Browser.cs
@@ -79,6 +79,7 @@ private bool SetTimer(uint actualDuration)
         }
 
         // shortest time of all TimerQueues
+        [DynamicDependency("TimerHandler")] // https://github.com/dotnet/runtime/issues/101434
         private static unsafe void ReplaceNextTimer(long shortestDueTimeMs, long currentTimeMs)
         {
             if (shortestDueTimeMs == long.MaxValue)