diff --git a/src/rsrv/caservertask.c b/src/rsrv/caservertask.c
index a92eb5627..200592bf7 100644
--- a/src/rsrv/caservertask.c
+++ b/src/rsrv/caservertask.c
@@ -294,7 +294,7 @@ LOCAL int req_server (void)
 
     /* get server's Internet address */
     if (bind(IOC_sock, (struct sockaddr *)&serverAddr, sizeof(serverAddr)) < 0) {
-        errlogPrintf ("CAS: Bind error\n");
+        errlogPrintf ( "CAS: TCP server port bind error was %s\n", SOCKERRSTR ( SOCKERRNO ) );
         socket_close (IOC_sock);
         threadSuspendSelf ();
     }
diff --git a/src/rsrv/cast_server.c b/src/rsrv/cast_server.c
index 2361138bf..5d953204e 100644
--- a/src/rsrv/cast_server.c
+++ b/src/rsrv/cast_server.c
@@ -185,7 +185,7 @@ int cast_server(void)
     
     /* get server's Internet address */
     if( bind(IOC_cast_sock, (struct sockaddr *)&sin, sizeof (sin)) < 0){
-        epicsPrintf ("CAS: cast bind error\n");
+        epicsPrintf ("CAS: UDP server port bind error was %s\n", SOCKERRSTR ( SOCKERRNO ) );
         socket_close (IOC_cast_sock);
         threadSuspendSelf ();
     }