diff --git a/doc/usage/cmd/wget.rst b/doc/usage/cmd/wget.rst
index e1e7f8d..8e7383b 100644
--- a/doc/usage/cmd/wget.rst
+++ b/doc/usage/cmd/wget.rst
@@ -16,7 +16,8 @@
 The wget command is used to download a file from an HTTP server.
 
 wget command will use HTTP over TCP to download files from an HTTP server.
-Currently it can only download image from an HTTP server hosted on port 80.
+By default the destination port is 80 and the source port is pseudo-random.
+The environment variable *httpdstp* can be used to set the destination port.
 
 address
     memory address for the data downloaded
diff --git a/doc/usage/environment.rst b/doc/usage/environment.rst
index c57b717..82b6ea7 100644
--- a/doc/usage/environment.rst
+++ b/doc/usage/environment.rst
@@ -306,6 +306,10 @@
     anything other than "no", U-Boot does go through all
     available network interfaces.
 
+httpdstp
+    If this is set, the value is used for HTTP's TCP
+    destination port instead of the default port 80.
+
 netretry
     When set to "no" each network operation will
     either succeed or fail without retrying.