diff --git a/include/libultra/ultratypes.h b/include/libultra/ultratypes.h
index cb22866b..ccb05f87 100644
--- a/include/libultra/ultratypes.h
+++ b/include/libultra/ultratypes.h
@@ -1,5 +1,5 @@
-#ifndef U64TYPES_H
-#define U64TYPES_H
+#ifndef ULTRATYPES_H
+#define ULTRATYPES_H
 
 #include "types.h"
 
diff --git a/include/m_actor.h b/include/m_actor.h
index c62d3ff6..0d39b13d 100644
--- a/include/m_actor.h
+++ b/include/m_actor.h
@@ -9,6 +9,7 @@ extern "C" {
 
 typedef struct actor_s {
   /* TODO ... */
+  u8 _tmp;
 } ACTOR;
 
 #ifdef __cplusplus