diff --git a/docs/libcurl/opts/CURLOPT_CRLF.3 b/docs/libcurl/opts/CURLOPT_CRLF.3
index 68919efd0..9bf82af3c 100644
--- a/docs/libcurl/opts/CURLOPT_CRLF.3
+++ b/docs/libcurl/opts/CURLOPT_CRLF.3
@@ -36,7 +36,7 @@ This is a legacy option of questionable use.
 .SH DEFAULT
 0
 .SH PROTOCOLS
-All
+All except SMTP
 .SH EXAMPLE
 TODO
 .SH AVAILABILITY