diff --git a/src/gsm/gsm48.c b/src/gsm/gsm48.c
index 61e5d2c..fe62dee 100644
--- a/src/gsm/gsm48.c
+++ b/src/gsm/gsm48.c
@@ -285,15 +285,22 @@
 	lai48->lac = htons(lac);
 }
 
+/* Attention: this function retunrs true integers, not hex! */
 int gsm48_decode_lai(struct gsm48_loc_area_id *lai, uint16_t *mcc,
 		     uint16_t *mnc, uint16_t *lac)
 {
-	*mcc = ((lai->digits[0] & 0x0f) << 8)
-	     | (lai->digits[0] & 0xf0)
-	     | (lai->digits[1] & 0x0f);
-	*mnc = ((lai->digits[2] & 0x0f) << 8)
-	     | (lai->digits[2] & 0xf0)
-	     | ((lai->digits[1] & 0xf0) >> 4);
+	*mcc = (lai->digits[0] & 0x0f) * 100
+	     + (lai->digits[0] >> 4) * 10
+	     + (lai->digits[1] & 0x0f);
+
+	if ((lai->digits[1] & 0xf0) == 0xf0) {
+		*mnc = (lai->digits[2] & 0x0f) * 10
+		     + (lai->digits[2] >> 4);
+	} else {
+		*mnc = (lai->digits[2] & 0x0f) * 100
+		     + (lai->digits[2] >> 4) * 10
+		     + (lai->digits[1] >> 4);
+	}
 	*lac = ntohs(lai->lac);
 
 	return 0;