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-rw-r--r--docs/libcurl/curl_formadd.35
1 files changed, 3 insertions, 2 deletions
diff --git a/docs/libcurl/curl_formadd.3 b/docs/libcurl/curl_formadd.3
index e55c542f2..190a6b20d 100644
--- a/docs/libcurl/curl_formadd.3
+++ b/docs/libcurl/curl_formadd.3
@@ -106,8 +106,9 @@ long which gives the length of the buffer.
Tells libcurl to use the \fICURLOPT_READFUNCTION\fP callback to get data. The
parameter you pass to \fICURLFORM_STREAM\fP is the pointer passed on to the
read callback's fourth argument. If you want the part to look like a file
-upload one, set the \fICURLFORM_FILENAME\fP parameter as well. (Option added
-in libcurl 7.18.2)
+upload one, set the \fICURLFORM_FILENAME\fP parameter as well. Note that when
+using \fICURLFORM_STREAM\fP, \fICURLFORM_CONTENTSLENGTH\fP must also be set
+with the total expected length of the part. (Option added in libcurl 7.18.2)
.IP CURLFORM_ARRAY
Another possibility to send options to curl_formadd() is the
\fBCURLFORM_ARRAY\fP option, that passes a struct curl_forms array pointer as