diff --git a/src/concurrent/msg.h b/src/concurrent/msg.h
index 6c45d3c..94c2805 100644
--- a/src/concurrent/msg.h
+++ b/src/concurrent/msg.h
@@ -1,14 +1,22 @@
 #pragma once
 
+struct msgq;
+
 enum {
     ax_msg_shutdown_TAG,
     ax_msg_load_font_TAG,
+    ax_msg_theme_loaded_TAG,
 };
 
 struct ax_msg_shutdown {
 };
 
 struct ax_msg_load_font {
+    struct msgq* callback_mq;
     struct ax_theme* theme;
     int category;
 };
+
+struct ax_msg_theme_loaded {
+    struct ax_theme* theme;
+};