diff --git a/doc/minetest.6 b/doc/minetest.6
index fe260da08..2a39b870d 100644
--- a/doc/minetest.6
+++ b/doc/minetest.6
@@ -28,6 +28,9 @@ Disable unit tests
 \-\-enable\-unittests
 Enable unit tests
 .TP
+\-\-gameid <value>
+Set gameid
+.TP
 \-\-go
 Disable main menu
 .TP
diff --git a/doc/minetestserver.6 b/doc/minetestserver.6
index 0db7e3863..dffe0fc8e 100644
--- a/doc/minetestserver.6
+++ b/doc/minetestserver.6
@@ -25,6 +25,9 @@ Disable unit tests
 \-\-enable\-unittests
 Enable unit tests
 .TP
+\-\-gameid <value>
+Set gameid
+.TP
 \-\-help
 Show allowed options
 .TP