diff --git a/docs/irssi.1 b/docs/irssi.1
index e435ec46..b7602c18 100644
--- a/docs/irssi.1
+++ b/docs/irssi.1
@@ -24,10 +24,6 @@ specifies the home directory of Irssi.
 Default is 
 .BR ~/.irssi
 .TP
-.BI "\-\-session="PATH
-this option is here just for internal use. It is needed during an /UPGRADE.
-For more information see /help upgrade.
-.TP
 .BI "\-c, \-\-connect="SERVER
 connects to 
 .I SERVER
diff --git a/src/core/session.c b/src/core/session.c
index 4b0773fc..ee1e2456 100644
--- a/src/core/session.c
+++ b/src/core/session.c
@@ -335,7 +335,7 @@ static void sig_init_finished(void)
 void session_register_options(void)
 {
 	static struct poptOption options[] = {
-		{ "session", 0, POPT_ARG_STRING, &session_file, 0, "Used by /UPGRADE command", "PATH" },
+		{ "session", 0, POPT_ARG_STRING | POPT_ARGFLAG_DOC_HIDDEN, &session_file, 0, "Used by /UPGRADE command", "PATH" },
 		{ NULL, '\0', 0, NULL }
 	};