diff --git a/docs/libcurl/opts/CURLOPT_POSTFIELDS.3 b/docs/libcurl/opts/CURLOPT_POSTFIELDS.3
index f9f9eadc8..17ec2d76f 100644
--- a/docs/libcurl/opts/CURLOPT_POSTFIELDS.3
+++ b/docs/libcurl/opts/CURLOPT_POSTFIELDS.3
@@ -42,16 +42,15 @@ This POST is a normal application/x-www-form-urlencoded kind (and libcurl will
 set that Content-Type by default when this option is used), which is commonly
 used by HTML forms. Change Content-Type with \fICURLOPT_HTTPHEADER(3)\fP.
 
-Using \fICURLOPT_POSTFIELDS(3)\fP implies \fICURLOPT_POST(3)\fP.
-
 You can use \fIcurl_easy_escape(3)\fP to url-encode your data, if necessary. It
 returns a pointer to an encoded string that can be passed as \fIpostdata\fP.
 
-If you want to do a zero-byte POST, you need to set
-\fICURLOPT_POSTFIELDSIZE(3)\fP explicitly to zero, as simply setting
-\fICURLOPT_POSTFIELDS(3)\fP to NULL or "" just effectively disables the
-sending of the specified string. libcurl will instead assume that you'll send
-the POST data using the read callback!
+Using \fICURLOPT_POSTFIELDS(3)\fP implies \fICURLOPT_POST(3)\fP.
+
+If \fICURLOPT_POSTFIELDS(3)\fP is explicitly set to NULL then libcurl will get
+the POST data from the read callback. If you want to send a zero-byte POST set
+\fICURLOPT_POSTFIELDS(3)\fP to an empty string, or set \fICURLOPT_POST(3)\fP to
+1 and \fICURLOPT_POSTFIELDSIZE(3)\fP to 0.
 
 Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue" header.
 You can disable this header with \fICURLOPT_HTTPHEADER(3)\fP as usual.