diff --git a/src/libraries/System.Diagnostics.DiagnosticSource/ref/System.Diagnostics.DiagnosticSourceActivity.cs b/src/libraries/System.Diagnostics.DiagnosticSource/ref/System.Diagnostics.DiagnosticSourceActivity.cs
index 962b663e3a4ac..2896367a8ad14 100644
--- a/src/libraries/System.Diagnostics.DiagnosticSource/ref/System.Diagnostics.DiagnosticSourceActivity.cs
+++ b/src/libraries/System.Diagnostics.DiagnosticSource/ref/System.Diagnostics.DiagnosticSourceActivity.cs
@@ -204,7 +204,7 @@ public readonly struct ActivityEvent
     }
     public readonly struct ActivityContext : System.IEquatable<System.Diagnostics.ActivityContext>
     {
-        public ActivityContext(System.Diagnostics.ActivityTraceId traceId, System.Diagnostics.ActivitySpanId spanId, System.Diagnostics.ActivityTraceFlags traceOptions, string? traceState = null, bool isRemote = false) { throw null; }
+        public ActivityContext(System.Diagnostics.ActivityTraceId traceId, System.Diagnostics.ActivitySpanId spanId, System.Diagnostics.ActivityTraceFlags traceFlags, string? traceState = null, bool isRemote = false) { throw null; }
         public System.Diagnostics.ActivityTraceId TraceId  { get { throw null; } }
         public System.Diagnostics.ActivitySpanId SpanId  { get { throw null; } }
         public System.Diagnostics.ActivityTraceFlags TraceFlags  { get { throw null; } }