diff --git a/include/types/hlua.h b/include/types/hlua.h
index b2c3997..d05f59c 100644
--- a/include/types/hlua.h
+++ b/include/types/hlua.h
@@ -41,4 +41,12 @@
 	struct task *task; /* The task to be wake if an event occurs. */
 };
 
+/* This is a part of the list containing references to functions
+ * called at the initialisation time.
+ */
+struct hlua_init_function {
+	struct list l;
+	int function_ref;
+};
+
 #endif /* _TYPES_HLUA_H */