diff --git a/docs/cmdline-opts/max-filesize.d b/docs/cmdline-opts/max-filesize.d
index e1e2849fc..2f82998d7 100644
--- a/docs/cmdline-opts/max-filesize.d
+++ b/docs/cmdline-opts/max-filesize.d
@@ -12,6 +12,6 @@ A size modifier may be used. For example, Appending 'k' or 'K' will count the
 number as kilobytes, 'm' or 'M' makes it megabytes, while 'g' or 'G' makes it
 gigabytes. Examples: 200K, 3m and 1G. (Added in 7.58.0)
 
-**NOTE**: The file size is not always known prior to download, and for such
-files this option has no effect even if the file transfer ends up being larger
-than this given limit. This concerns both FTP and HTTP transfers.
+**NOTE**: For protocols where the size is not known in advance (including FTP
+and HTTP) this option has no effect even if the file transfer ends up being
+larger than the given limit.
diff --git a/docs/libcurl/opts/CURLOPT_MAXFILESIZE.3 b/docs/libcurl/opts/CURLOPT_MAXFILESIZE.3
index 172ae81c9..0f368fea8 100644
--- a/docs/libcurl/opts/CURLOPT_MAXFILESIZE.3
+++ b/docs/libcurl/opts/CURLOPT_MAXFILESIZE.3
@@ -33,15 +33,15 @@ Pass a long as parameter. This allows you to specify the maximum \fIsize\fP
 this value, the transfer will not start and \fICURLE_FILESIZE_EXCEEDED\fP will
 be returned.
 
-The file size is not always known prior to download, and for such files this
-option has no effect even if the file transfer ends up being larger than this
-given limit. This concerns both FTP and HTTP transfers.
+For protocols where the size is not known in advance (including FTP and HTTP)
+this option has no effect even if the file transfer ends up being larger than
+the given limit.
 
 If you want a limit above 2GB, use \fICURLOPT_MAXFILESIZE_LARGE(3)\fP.
 .SH DEFAULT
 None
 .SH PROTOCOLS
-FTP and HTTP
+FTP, HTTP and MQTT
 .SH EXAMPLE
 .nf
 CURL *curl = curl_easy_init();
diff --git a/docs/libcurl/opts/CURLOPT_MAXFILESIZE_LARGE.3 b/docs/libcurl/opts/CURLOPT_MAXFILESIZE_LARGE.3
index 3af97f83f..fa492e284 100644
--- a/docs/libcurl/opts/CURLOPT_MAXFILESIZE_LARGE.3
+++ b/docs/libcurl/opts/CURLOPT_MAXFILESIZE_LARGE.3
@@ -35,13 +35,13 @@ Pass a curl_off_t as parameter. This allows you to specify the maximum
 larger than this value, the transfer will not start and
 \fICURLE_FILESIZE_EXCEEDED\fP will be returned.
 
-The file size is not always known prior to download, and for such files this
-option has no effect even if the file transfer ends up being larger than this
-given limit. This concerns both FTP and HTTP transfers.
+For protocols where the size is not known in advance (including FTP and HTTP)
+this option has no effect even if the file transfer ends up being larger than
+the given limit.
 .SH DEFAULT
 None
 .SH PROTOCOLS
-FTP and HTTP
+FTP, HTTP and MQTT
 .SH EXAMPLE
 .nf
 CURL *curl = curl_easy_init();