diff --git a/src/gcal-application.c b/src/gcal-application.c
index def84f4e..156b4352 100644
--- a/src/gcal-application.c
+++ b/src/gcal-application.c
@@ -281,6 +281,7 @@ gcal_application_show_about (GSimpleAction *simple,
                          "program-name", "Calendar",
                          "version", VERSION,
                          "copyright", copyright,
+                         "license-type", GTK_LICENSE_GPL_3_0,
                          "authors", authors,
                          "artists", artists,
                          "logo-icon-name", "x-office-calendar",