diff --git a/xml/System.Threading/Timer.xml b/xml/System.Threading/Timer.xml
index a4cf6f3e451..36b95fa9c27 100644
--- a/xml/System.Threading/Timer.xml
+++ b/xml/System.Threading/Timer.xml
@@ -594,7 +594,7 @@ Sub TimerCallback(state As Object)
         <Parameter Name="period" Type="System.Int64" Index="1" FrameworkAlternate="netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netstandard-2.0;xamarinandroid-7.1;xamarinios-10.8;xamarinmac-3.0;netstandard-2.1;netcore-3.1" />
       </Parameters>
       <Docs>
-        <param name="dueTime">The amount of time to delay before the invoking the callback method specified when the <see cref="T:System.Threading.Timer" /> was constructed, in milliseconds. Specify <see cref="F:System.Threading.Timeout.Infinite" /> to prevent the timer from restarting. Specify zero (0) to restart the timer immediately.</param>
+        <param name="dueTime">The amount of time to delay before the invoking the callback method specified when the <see cref="T:System.Threading.Timer" /> was constructed, in milliseconds. Specify <see cref="F:System.Threading.Timeout.Infinite" /> to prevent the timer from restarting. Specify zero (0) to restart the timer immediately.  This value must be less than or equal to 4294967294.</param>
         <param name="period">The time interval between invocations of the callback method specified when the <see cref="T:System.Threading.Timer" /> was constructed, in milliseconds. Specify <see cref="F:System.Threading.Timeout.Infinite" /> to disable periodic signaling.</param>
         <summary>Changes the start time and the interval between method invocations for a timer, using 64-bit signed integers to measure time intervals.</summary>
         <returns>
@@ -614,8 +614,11 @@ Sub TimerCallback(state As Object)
  ]]></format>
         </remarks>
         <exception cref="T:System.ObjectDisposedException">The <see cref="T:System.Threading.Timer" /> has already been disposed.</exception>
-        <exception cref="T:System.ArgumentOutOfRangeException">The <paramref name="dueTime" /> or <paramref name="period" /> parameter is less than -1.</exception>
-        <exception cref="T:System.NotSupportedException">The <paramref name="dueTime" /> or <paramref name="period" /> parameter is greater than 4294967294.</exception>
+        <exception cref="T:System.ArgumentOutOfRangeException"><paramref name="dueTime" /> or <paramref name="period" /> is less than -1.
+        
+-or-
+
+<paramref name="dueTime" /> or <paramref name="period" /> is greater than 4294967294.</exception>
         <related type="Article" href="~/docs/standard/threading/timers.md">Timers</related>
       </Docs>
     </Member>