diff --git a/src/gsm.c b/src/gsm.c
index 4aeedd2..b81cd3b 100644
--- a/src/gsm.c
+++ b/src/gsm.c
@@ -201,11 +201,14 @@ static struct
 } _gsm_models[] =
 {
 	{ "\"Neo1973 Embedded GSM Modem\"",
-		GSM_MODEM_QUIRK_CPIN_QUOTES			},
+		GSM_MODEM_QUIRK_CPIN_QUOTES
+			| GSM_MODEM_QUIRK_WANT_SMSC_IN_PDU	},
 	{ "\"Neo1973 GTA01/GTA02 Embedded GSM Modem\"",
-		GSM_MODEM_QUIRK_CPIN_QUOTES			},
+		GSM_MODEM_QUIRK_CPIN_QUOTES
+			| GSM_MODEM_QUIRK_WANT_SMSC_IN_PDU	},
 	{ "\"Neo1973 GTA02 Embedded GSM Modem\"",
-		GSM_MODEM_QUIRK_CPIN_QUOTES			},
+		GSM_MODEM_QUIRK_CPIN_QUOTES
+			| GSM_MODEM_QUIRK_WANT_SMSC_IN_PDU	},
 	{ NULL,	0						}
 };
 
diff --git a/src/modem.h b/src/modem.h
index c3e1ac7..a48b97f 100644
--- a/src/modem.h
+++ b/src/modem.h
@@ -35,7 +35,8 @@ typedef enum _GSMModemAlphabet
 typedef enum _GSMModemQuirk
 {
 	GSM_MODEM_QUIRK_NONE = 0,
-	GSM_MODEM_QUIRK_CPIN_QUOTES = 1
+	GSM_MODEM_QUIRK_CPIN_QUOTES = 1,
+	GSM_MODEM_QUIRK_WANT_SMSC_IN_PDU = 2
 } GSMModemQuirk;