diff --git a/axfer/axfer-transfer.1 b/axfer/axfer-transfer.1
index 1fdfc91..89df3cc 100644
--- a/axfer/axfer-transfer.1
+++ b/axfer/axfer-transfer.1
@@ -560,8 +560,9 @@ audio data frame.
 .B \-\-snoop
 
 This option allows this program to run snoop mode. In this mode, libffado
-listens all isochronous channels. When isochronous communication starts
-by any unit on the same bus, the packets can be handled by this program.
+listens isochronous channels to which device transfers isochronous packet. When
+isochronous communication starts by any unit on the same bus, the packets can
+be handled by this program.
 
 .TP
 .B \-\-sched\-priority