diff --git a/ibsim/sim_net.c b/ibsim/sim_net.c
index 551a9da..75bae2a 100644
--- a/ibsim/sim_net.c
+++ b/ibsim/sim_net.c
@@ -110,7 +110,7 @@ static const uint8_t swport_down[] = {
 static const uint8_t hcaport[] = {
 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	0xFE, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	0x00, 0x02, 0x00, 0x01, 0x00, 0x50, 0xC0, 0x48,
+	0x00, 0x02, 0x00, 0x01, 0x00, 0x40, 0xC0, 0x48,
 	0x00, 0x00, 0x0F, 0xF9, 0x01, 0x03, 0x03, 0x02,
 	0x12, 0x52, 0x00, 0x11, 0x40, 0x40, 0x00, 0x08,
 	0x08, 0x04, 0xFF, 0x10, 0x00, 0x00, 0x00, 0x00,