diff --git a/src/libCom/osi/osiSock.h b/src/libCom/osi/osiSock.h
index 84fcc17f4..90d36165e 100644
--- a/src/libCom/osi/osiSock.h
+++ b/src/libCom/osi/osiSock.h
@@ -50,8 +50,7 @@ epicsShareFunc void epicsShareAPI
 enum epicsSocketSystemCallInterruptMechanismQueryInfo { 
     esscimqi_socketCloseRequired, 
     esscimqi_socketBothShutdownRequired,
-    esscimqi_socketSigAlarmRequired,
-    esscimqi_shuechanismImplemenedHerein
+    esscimqi_socketSigAlarmRequired
 };
 epicsShareFunc enum epicsSocketSystemCallInterruptMechanismQueryInfo 
         epicsSocketSystemCallInterruptMechanismQuery ();