int (*request_firmware)(struct dvb_frontend* fe, const struct firmware **fw, char* name);
};
-#if IS_ENABLED(CONFIG_DVB_SP8870)
+#if IS_REACHABLE(CONFIG_DVB_SP8870)
extern struct dvb_frontend* sp8870_attach(const struct sp8870_config* config,
struct i2c_adapter* i2c);
#else