diff --git a/src/rsrv/cast_server.c b/src/rsrv/cast_server.c
index cfd92dc32..c94b04ff6 100644
--- a/src/rsrv/cast_server.c
+++ b/src/rsrv/cast_server.c
@@ -100,7 +100,7 @@ int cast_server(void)
 	struct sockaddr_in		new_recv_addr;
   	int  				recv_addr_size;
   	unsigned			nchars;
-	short				port;
+	unsigned short			port;
 
 	taskwdInsert((int)taskIdCurrent,NULL,NULL);
 
diff --git a/src/rsrv/online_notify.c b/src/rsrv/online_notify.c
index 8ba0d8aad..d2ef1f993 100644
--- a/src/rsrv/online_notify.c
+++ b/src/rsrv/online_notify.c
@@ -80,7 +80,7 @@ int rsrv_online_notify_task()
 	int			status;
 	int			sock;
   	int			true = TRUE;
-	short			port;
+	unsigned short		port;
 
 	taskwdInsert(taskIdSelf(),NULL,NULL);
 
diff --git a/src/rsrv/server.h b/src/rsrv/server.h
index 4f2caa942..85c409ec0 100644
--- a/src/rsrv/server.h
+++ b/src/rsrv/server.h
@@ -174,7 +174,7 @@ char				get;		/* T: get F: monitor */
 GLBLTYPE int			CASDEBUG;
 GLBLTYPE int 		 	IOC_sock;
 GLBLTYPE int			IOC_cast_sock;
-GLBLTYPE int			ca_server_port;
+GLBLTYPE unsigned short		ca_server_port;
 GLBLTYPE ELLLIST		clientQ;	/* locked by clientQlock */
 GLBLTYPE ELLLIST		rsrv_free_clientQ; /* locked by clientQlock */
 GLBLTYPE ELLLIST		rsrv_free_addrq;