diff --git a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
index 321d60de739b32..d6093b4fb66bb3 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
@@ -495,6 +495,9 @@ public static void SendCommand(EventSource eventSource, EventCommand command, ID
         /// </summary>
         public override string ToString()
         {
+            if (!IsSupported)
+                return base.ToString()!;
+
             return SR.Format(SR.EventSource_ToString, Name, Guid);
         }