diff --git a/q931.c b/q931.c
index b8599f2..5696e32 100755
--- a/q931.c
+++ b/q931.c
@@ -992,10 +992,15 @@ static FUNC_RECV(receive_display)
 
 static FUNC_SEND(transmit_display)
 {
+	int i;
 	if ((pri->switchtype != PRI_SWITCH_NI1) && strlen(call->callername)) {
-		ie->data[0] = 0xb1;
-		memcpy(ie->data + 1, call->callername, strlen(call->callername));
-		return 3 + strlen(call->callername);
+		i = 0;
+		if(pri->switchtype != PRI_SWITCH_EUROISDN_E1) {
+			ie->data[0] = 0xb1;
+			++i;
+		}
+		memcpy(ie->data + i, call->callername, strlen(call->callername));
+		return 2 + i + strlen(call->callername);
 	}
 	return 0;
 }