diff --git a/core/net/uip.c b/core/net/uip.c
index 2aa22ac9c..40701c790 100644
--- a/core/net/uip.c
+++ b/core/net/uip.c
@@ -41,7 +41,7 @@
  *
  * This file is part of the uIP TCP/IP stack.
  *
- * $Id: uip.c,v 1.17 2009/10/27 22:34:08 adamdunkels Exp $
+ * $Id: uip.c,v 1.18 2009/10/27 23:09:58 adamdunkels Exp $
  *
  */
 
@@ -696,7 +696,7 @@ uip_process(u8_t flag)
 #if UIP_ACTIVE_OPEN
     } else if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_SENT) {
       /* In the SYN_SENT state, we retransmit out SYN. */
-      UIP_TCP_BUF->flags = 0;
+      BUF->flags = 0;
       goto tcp_send_syn;
 #endif /* UIP_ACTIVE_OPEN */
     }