diff --git a/src/rsrv/caservertask.c b/src/rsrv/caservertask.c
index 7f2364d38..897a117c0 100644
--- a/src/rsrv/caservertask.c
+++ b/src/rsrv/caservertask.c
@@ -110,6 +110,7 @@ static void req_server (void *pParm)
     status = bind ( IOC_sock, (struct sockaddr *) &serverAddr, sizeof ( serverAddr ) );
 	if ( status < 0 ) {
 		if ( SOCKERRNO == SOCK_EADDRINUSE ) {
+#ifndef vxWorks
             const char* multiple_iocs = getenv("EPICS_ALLOW_MULTIPLE_IOCS");
             if (multiple_iocs && strcasecmp(multiple_iocs, "NO") == 0)
             {
@@ -117,6 +118,7 @@ static void req_server (void *pParm)
                 errlogPrintf ( "CAS: Probably already running an IOC on this computer.\n");
                 epicsExit(1);
             }
+#endif
 			/*
 			 * enable assignment of a default port
 			 * (so the getsockname() call below will