diff --git a/src/setup.c b/src/setup.c
index 6f2bbe2..ee0b9b5 100644
--- a/src/setup.c
+++ b/src/setup.c
@@ -658,11 +658,15 @@ setup_dialog_free (SetupDialog *dialog)
     g_slice_free (SetupDialog, dialog);
 }
 
+#define WINDOW_TITLE_SIZE 500
+
 static void
 start (const gchar *engine_name)
 {
     gchar **strv;
     SetupDialog *dialog;
+    const gchar *base_window_title;
+    gchar full_window_title[WINDOW_TITLE_SIZE] = "";
 
     ibus_init ();
     ibus_m17n_init_common ();
@@ -677,6 +681,14 @@ start (const gchar *engine_name)
 
     setup_dialog_load_config (dialog);
 
+    base_window_title = gtk_window_get_title(GTK_WINDOW (dialog->dialog));
+    strncat(full_window_title, base_window_title,
+            WINDOW_TITLE_SIZE - 1);
+    strncat(full_window_title, " ",
+            WINDOW_TITLE_SIZE - strlen(base_window_title) - 1);
+    strncat(full_window_title, engine_name,
+            WINDOW_TITLE_SIZE - strlen(base_window_title) - 2);
+    gtk_window_set_title(GTK_WINDOW (dialog->dialog), full_window_title);
     gtk_window_present (GTK_WINDOW (dialog->dialog));
     gtk_dialog_run (GTK_DIALOG (dialog->dialog));