diff --git a/src/apprt/gtk-ng/class/application.zig b/src/apprt/gtk-ng/class/application.zig
index 385749c04..6a49dd54c 100644
--- a/src/apprt/gtk-ng/class/application.zig
+++ b/src/apprt/gtk-ng/class/application.zig
@@ -15,6 +15,7 @@ const cgroup = @import("../cgroup.zig");
 const CoreApp = @import("../../../App.zig");
 const configpkg = @import("../../../config.zig");
 const internal_os = @import("../../../os/main.zig");
+const systemd = @import("../../../os/systemd.zig");
 const terminal = @import("../../../terminal/main.zig");
 const xev = @import("../../../global.zig").xev;
 const CoreConfig = configpkg.Config;
@@ -376,6 +377,9 @@ pub const Application = extern struct {
             return;
         }
 
+        // Tell systemd that we are ready.
+        systemd.notify.ready();
+
         log.debug("entering runloop", .{});
         defer log.debug("exiting runloop", .{});
         priv.running = true;