diff --git a/Source/charon/daemon.c b/Source/charon/daemon.c
index 75b3f9724..8636f0b46 100644
--- a/Source/charon/daemon.c
+++ b/Source/charon/daemon.c
@@ -217,7 +217,7 @@ static void register_signals()
 static status_t initialize_globals()
 {
  	/* initialize global object */
- 	global_socket = socket_create(4500);
+ 	global_socket = socket_create(IKEV2_UDP_PORT);
  	global_ike_sa_manager = ike_sa_manager_create();
  	global_job_queue = job_queue_create();
  	global_event_queue = event_queue_create();
diff --git a/Source/charon/daemon.h b/Source/charon/daemon.h
index 150b145af..d1df42f88 100644
--- a/Source/charon/daemon.h
+++ b/Source/charon/daemon.h
@@ -29,5 +29,7 @@
 
 #define NUMBER_OF_WORKING_THREADS 4
 
+#define IKEV2_UDP_PORT 500
+
 
 #endif /*DAEMON_H_*/