diff --git a/src/libraries/System.Private.CoreLib/generators/EventSourceGenerator.Emitter.cs b/src/libraries/System.Private.CoreLib/generators/EventSourceGenerator.Emitter.cs
index d855d34634b1e0..894ae45816ad38 100644
--- a/src/libraries/System.Private.CoreLib/generators/EventSourceGenerator.Emitter.cs
+++ b/src/libraries/System.Private.CoreLib/generators/EventSourceGenerator.Emitter.cs
@@ -32,7 +32,7 @@ public void Emit(EventSourceClass[] eventSources, CancellationToken cancellation
                     _builder.AppendLine("using System;");
                     GenType(ec);
 
-                    _context.AddSource($"{ec.ClassName}.Generated", SourceText.From(_builder.ToString(), Encoding.UTF8));
+                    _context.AddSource($"{ec.ClassName}.g.cs", SourceText.From(_builder.ToString(), Encoding.UTF8));
 
                     _builder.Clear();
                 }