diff --git a/oswan/source/io.cpp b/oswan/source/io.cpp
index 890ba09..3651fe8 100644
--- a/oswan/source/io.cpp
+++ b/oswan/source/io.cpp
@@ -22,6 +22,7 @@
 #include "log.h"
 #include "rom.h"
 #include "./nec/nec.h"
+#include "./nec/necintrf.h"
 #include "initialIo.h"
 #include "gpu.h"
 #include "audio.h"
@@ -31,6 +32,7 @@ extern uint8 *externalEeprom;
 extern uint32 externalEepromAddressMask;
 extern uint32 romAddressMask;
 extern uint16_t *internalEeprom;
+extern nec_Regs I;
 
 enum
 {
@@ -240,8 +242,6 @@ void close_serial()
    serialfd = -1;
 }
 
-void nec_int(DWORD wektor);
-
 void check_serial_data()
 {
    unsigned char buf[10];