diff --git a/include/uapi/linux/dvb/frontend.h b/include/uapi/linux/dvb/frontend.h
index 0380e62fc8b279516cb62786eaa8e642f142e353..e764fd8b7e35b764aed1a7c67dd468f628fe5ea0 100644
--- a/include/uapi/linux/dvb/frontend.h
+++ b/include/uapi/linux/dvb/frontend.h
@@ -540,14 +540,14 @@ struct dvb_ofdm_parameters {
 };
 
 struct dvb_frontend_parameters {
-	__u32 frequency;     /* (absolute) frequency in Hz for QAM/OFDM/ATSC */
-			     /* intermediate frequency in kHz for QPSK */
+	__u32 frequency;     /* (absolute) frequency in Hz for DVB-C/DVB-T/ATSC */
+			     /* intermediate frequency in kHz for DVB-S */
 	fe_spectral_inversion_t inversion;
 	union {
-		struct dvb_qpsk_parameters qpsk;
-		struct dvb_qam_parameters  qam;
-		struct dvb_ofdm_parameters ofdm;
-		struct dvb_vsb_parameters vsb;
+		struct dvb_qpsk_parameters qpsk;	/* DVB-S */
+		struct dvb_qam_parameters  qam;		/* DVB-C */
+		struct dvb_ofdm_parameters ofdm;	/* DVB-T */
+		struct dvb_vsb_parameters vsb;		/* ATSC */
 	} u;
 };