GtkTextIter input_iter;
        GtkTextMark *input_position = gtk_text_buffer_get_mark(window_buffer, "input_position");
        gtk_text_buffer_get_iter_at_mark(window_buffer, &input_iter, input_position);
+       gtk_text_buffer_apply_tag_by_name(window_buffer, "default", &input_iter, &end_iter);
        gtk_text_buffer_apply_tag_by_name(window_buffer, "input", &input_iter, &end_iter);
+       gtk_text_buffer_apply_tag_by_name(window_buffer, "glk-input", &input_iter, &end_iter);
 }
 
 /* Internal function: Callback for signal activate on the line input GtkEntry
                {
                        gtk_text_buffer_get_end_iter(buffer, &end);
                        gchar *text_to_insert = g_strconcat(text, "\n", NULL);
-                       gtk_text_buffer_insert_with_tags_by_name(buffer, &end, text_to_insert, -1, "default", "input", NULL);
+                       gtk_text_buffer_insert_with_tags_by_name(buffer, &end, text_to_insert, -1, "default", "input", "glk-input", NULL);
                }
 
                chars_written = finish_text_buffer_line_input(win, TRUE);