diff --git a/master.hpp b/master.hpp
index 27e81873..2b733f98 100644
--- a/master.hpp
+++ b/master.hpp
@@ -252,6 +252,19 @@ void MASTER_RET js_end(void);
 int MASTER_RET js_sense(void);
 // --------
 
+// Keyboard
+// --------
+
+void MASTER_RET key_start(void);
+void MASTER_RET key_end(void);
+
+void MASTER_RET key_beep_on(void);
+void MASTER_RET key_beep_off(void);
+int MASTER_RET key_sense(int keygroup);
+
+unsigned MASTER_RET key_sense_bios(void);
+// --------
+
 // Heap
 // ----
 
diff --git a/th01/main_01.cpp b/th01/main_01.cpp
index ec99f564..e4a4954c 100644
--- a/th01/main_01.cpp
+++ b/th01/main_01.cpp
@@ -4,7 +4,8 @@
  */
 
 extern "C" {
-#include "ReC98.h"
+#include "platform.h"
+#include "master.hpp"
 #include "pc98kbd.h"
 #include "th01/hardware/input.hpp"
 #include "th01/main/bomb.hpp"
diff --git a/th02/maine021.cpp b/th02/maine021.cpp
index 847d35d8..6008ebd3 100644
--- a/th02/maine021.cpp
+++ b/th02/maine021.cpp
@@ -6,7 +6,11 @@
 #pragma codeseg SHARED
 
 extern "C" {
-#include "th02/th02.h"
+#include <dos.h>
+#include "platform.h"
+#include "pc98.h"
+#include "planar.h"
+#include "master.hpp"
 #include "th02/hardware/frmdelay.h"
 
 #include "th02/hardware/keydelay.c"