diff --git a/doc/man1/rigctl.1 b/doc/man1/rigctl.1
index a1964b1c0..9e4e01527 100644
--- a/doc/man1/rigctl.1
+++ b/doc/man1/rigctl.1
@@ -447,7 +447,9 @@ Get
 .RI \(aq Frequency \(aq,
 in Hz.
 .IP
-Returns an integer value.
+Returns an integer value and the VFO hamlib thinks is active.
+Note that some rigs (e.g. all Icoms) cannot track current VFO so hamlib can
+get out of sync with the rig if the user presses rig buttons like the VFO.
 .
 .TP
 .BR M ", " set_mode " \(aq" \fIMode\fP "\(aq \(aq" \fIPassband\fP \(aq
diff --git a/doc/man1/rigctld.1 b/doc/man1/rigctld.1
index 149b20f32..5aca5923a 100644
--- a/doc/man1/rigctld.1
+++ b/doc/man1/rigctld.1
@@ -384,7 +384,10 @@ Get
 .RI \(aq Frequency \(aq,
 in Hz.
 .IP
-Returns an integer value.
+Returns an integer value and the VFO hamlib thinks is active.
+Note that some rigs (e.g. all Icoms) cannot track current VFO so hamlib can
+get out of sync with the rig if the user presses rig buttons like the VFO.
+rigctld clients should ensure they set the intended VFO or use vfo mode.
 .
 .TP
 .BR M ", " set_mode " \(aq" \fIMode\fP "\(aq \(aq" \fIPassband\fP \(aq