diff --git a/drivers/media/usb/dvb-usb/cxusb.c b/drivers/media/usb/dvb-usb/cxusb.c
index d60e36d5103a..b7461ac1ce74 100644
--- a/drivers/media/usb/dvb-usb/cxusb.c
+++ b/drivers/media/usb/dvb-usb/cxusb.c
@@ -1386,6 +1386,7 @@ static int cxusb_tt_ct2_4400_attach(struct dvb_usb_adapter *adap)
 	st->i2c_client_demod = client_demod;
 
 	/* attach tuner */
+	memset(&si2157_config, 0, sizeof(si2157_config));
 	si2157_config.fe = adap->fe_adap[0].fe;
 	memset(&info, 0, sizeof(struct i2c_board_info));
 	strlcpy(info.type, "si2157", I2C_NAME_SIZE);