diff --git a/drivers/atmodem/sim.c b/drivers/atmodem/sim.c
index c128e337..054f5482 100644
--- a/drivers/atmodem/sim.c
+++ b/drivers/atmodem/sim.c
@@ -1350,6 +1350,7 @@ static void at_pin_send_cb(gboolean ok, GAtResult *result,
 	case OFONO_VENDOR_ALCATEL:
 	case OFONO_VENDOR_HUAWEI:
 	case OFONO_VENDOR_SIMCOM:
+	case OFONO_VENDOR_SIERRA:
 		/*
 		 * On ZTE modems, after pin is entered, SIM state is checked
 		 * by polling CPIN as their modem doesn't provide unsolicited