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 b68bf0403ebec7..2e6793a8cacd7d 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
@@ -3898,7 +3898,9 @@ internal static void InitializeDefaultEventSources()
             if (IsMeterSupported)
             {
                 const string name = "System.Diagnostics.Metrics";
-                Guid id = new Guid("20752bc4-c151-50f5-f27b-df92d8af5a61");
+
+                // 20752bc4-c151-50f5-f27b-df92d8af5a61
+                Guid id = new Guid(0x20752BC4, 0xC151, 0x50F5, 0xF2, 0x7B, 0xDF, 0x92, 0xD8, 0xAF, 0x5A, 0x61);
                 EventSourceInitHelper.PreregisterEventProviders(id, name, EventSourceInitHelper.GetMetricsEventSource);
             }
         }
diff --git a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/RuntimeEventSource.cs b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/RuntimeEventSource.cs
index da0a5e6e437b58..30f62f7b4d5769 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/RuntimeEventSource.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/RuntimeEventSource.cs
@@ -14,7 +14,6 @@ namespace System.Diagnostics.Tracing
     [EventSourceAutoGenerate]
     internal sealed partial class RuntimeEventSource : EventSource
     {
-        internal static readonly Guid EventSourceGuid = new Guid("49592C0F-5A05-516D-AA4B-A64E02026C89");
         internal const string EventSourceName = "System.Runtime";
 
         public static class Keywords