diff --git a/core/net/tcpip.c b/core/net/tcpip.c
index 4b178a1db..fc6db0ad2 100644
--- a/core/net/tcpip.c
+++ b/core/net/tcpip.c
@@ -284,7 +284,7 @@ void
 tcp_attach(struct uip_conn *conn,
 	   void *appstate)
 {
-  register uip_tcp_appstate_t *s;
+  uip_tcp_appstate_t *s;
 
   s = &conn->appstate;
   s->p = PROCESS_CURRENT();
@@ -298,7 +298,7 @@ void
 udp_attach(struct uip_udp_conn *conn,
 	   void *appstate)
 {
-  register uip_udp_appstate_t *s;
+  uip_udp_appstate_t *s;
 
   s = &conn->appstate;
   s->p = PROCESS_CURRENT();
@@ -394,7 +394,7 @@ eventhandler(process_event_t ev, process_data_t data)
       }
 	 
       {
-        register struct uip_conn *cptr;
+        struct uip_conn *cptr;
 	    
         for(cptr = &uip_conns[0]; cptr < &uip_conns[UIP_CONNS]; ++cptr) {
           if(cptr->appstate.p == p) {
@@ -406,7 +406,7 @@ eventhandler(process_event_t ev, process_data_t data)
 #endif /* UIP_TCP */
 #if UIP_UDP
       {
-        register struct uip_udp_conn *cptr;
+        struct uip_udp_conn *cptr;
 
         for(cptr = &uip_udp_conns[0];
             cptr < &uip_udp_conns[UIP_UDP_CONNS]; ++cptr) {
@@ -697,7 +697,7 @@ tcpip_poll_tcp(struct uip_conn *conn)
 void
 tcpip_uipcall(void)
 {
-  register uip_udp_appstate_t *ts;
+  uip_udp_appstate_t *ts;
   
 #if UIP_UDP
   if(uip_conn != NULL) {
@@ -712,7 +712,7 @@ tcpip_uipcall(void)
 #if UIP_TCP
  {
    static unsigned char i;
-   register struct listenport *l;
+   struct listenport *l;
    
    /* If this is a connection request for a listening port, we must
       mark the connection with the right process ID. */