diff --git a/openbsc/src/nat/bsc_nat_utils.c b/openbsc/src/nat/bsc_nat_utils.c
index abcb271..b345a77 100644
--- a/openbsc/src/nat/bsc_nat_utils.c
+++ b/openbsc/src/nat/bsc_nat_utils.c
@@ -773,7 +773,9 @@
 			    TLVP_VAL(&tp, GSM48_IE_CALLED_BCD) - 1);
 
 	/* check if it looks international and stop */
-	if (strncmp(called.number, "+", 1) == 0)
+	if (called.plan != 1)
+		return msg;
+	if (called.type == 1)
 		return msg;
 	if (strncmp(called.number, "00", 2) == 0)
 		return msg;