diff --git a/runtime/doc/channel.txt b/runtime/doc/channel.txt
index 4049f22..39cb43c 100644
--- a/runtime/doc/channel.txt
+++ b/runtime/doc/channel.txt
@@ -536,7 +536,7 @@
 			GetChannel()->ch_evalraw(rawstring)
 
 ch_getbufnr({handle}, {what})				 *ch_getbufnr()*
-		Get the buffer number that {handle} is using for {what}.
+		Get the buffer number that {handle} is using for String {what}.
 		{handle} can be a Channel or a Job that has a Channel.
 		{what} can be "err" for stderr, "out" for stdout or empty for
 		socket output.
@@ -586,8 +586,8 @@
 
 
 ch_log({msg} [, {handle}])					*ch_log()*
-		Write {msg} in the channel log file, if it was opened with
-		|ch_logfile()|.
+		Write String {msg} in the channel log file, if it was opened
+		with |ch_logfile()|.
 		When {handle} is passed the channel number is used for the
 		message.
 		{handle} can be a Channel or a Job that has a Channel.  The
@@ -625,7 +625,7 @@
 		Open a channel to {address}.  See |channel|.
 		Returns a Channel.  Use |ch_status()| to check for failure.
 
-		{address} has the form "hostname:port", e.g.,
+		{address} is a String and has the form "hostname:port", e.g.,
 		"localhost:8765".
 
 		When using an IPv6 address, enclose it within square brackets.