diff --git a/docs/reference/gdk/gdk4-x11.toml.in b/docs/reference/gdk/gdk4-x11.toml.in
index 726725037c..daaf6dd68f 100644
--- a/docs/reference/gdk/gdk4-x11.toml.in
+++ b/docs/reference/gdk/gdk4-x11.toml.in
@@ -5,7 +5,7 @@ repository_url = "https://gitlab.gnome.org/GNOME/gtk.git"
 website_url = "https://www.gtk.org"
 authors = "GTK Development Team"
 logo_url = "gtk-logo.svg"
-license = "GPL-2.1-or-later"
+license = "LGPL-2.1-or-later"
 description = "The GTK toolkit"
 dependencies = ["Gdk-4.0"]
 devhelp = true