diff --git a/src/TraceEvent/Parsers/ClrTraceEventParser.cs b/src/TraceEvent/Parsers/ClrTraceEventParser.cs
index d8e2692e3..cbb899b63 100644
--- a/src/TraceEvent/Parsers/ClrTraceEventParser.cs
+++ b/src/TraceEvent/Parsers/ClrTraceEventParser.cs
@@ -12602,6 +12602,7 @@ public enum ThreadAdjustmentReason
         Stabilizing = 0x5,
         Starvation = 0x6,
         ThreadTimedOut = 0x7,
+        CooperativeBlocking = 0x8,
     }
 
     [Flags]