diff --git a/d1x-rebirth/include/hmp.h b/common/include/hmp.h
similarity index 100%
rename from d1x-rebirth/include/hmp.h
rename to common/include/hmp.h
diff --git a/d2x-rebirth/include/hmp.h b/d2x-rebirth/include/hmp.h
deleted file mode 100644
index 9e90ef947..000000000
--- a/d2x-rebirth/include/hmp.h
+++ /dev/null
@@ -1,91 +0,0 @@
-#ifndef __HMP_H
-#define __HMP_H
-
-#ifdef _WIN32
-#include <windows.h>
-#include <mmsystem.h>
-#endif
-#include "physfsx.h"
-
-#define HMP_TRACKS 32
-#ifdef _WIN32
-#define MIDI_VOLUME_SCALE 128
-#define HMP_BUFFERS 4
-#define HMP_BUFSIZE 1024
-#define HMP_INVALID_FILE -1
-#define HMP_OUT_OF_MEM -2
-#define HMP_MM_ERR -3
-#define HMP_EOF 1
-
-#define MIDI_CONTROL_CHANGE        0xB
-#define MIDI_PROGRAM_CHANGE        0xC
-
-#define MIDI_BANK_SELECT_MSB       0x00
-#define MIDI_BANK_SELECT_LSB       0x20
-#define MIDI_VOLUME                0x07
-#define MIDI_PANPOT                0x0A
-#define MIDI_REVERB                0x5B
-#define MIDI_CHORUS                0x5D
-#define MIDI_ALL_SOUNDS_OFF        0x78
-#define MIDI_RESET_ALL_CONTROLLERS 0x79
-#define MIDI_ALL_NOTES_OFF         0x7B
-
-#define HMP_LOOP_START             0x6E
-#define HMP_LOOP_END               0x6F
-#endif
-
-#ifdef _WIN32
-typedef struct event {
-	unsigned int delta;
-	unsigned char msg[3];
-	unsigned char *data;
-	unsigned int datalen;
-} event;
-#endif
-
-typedef struct hmp_track {
-	unsigned char *data;
-	unsigned char *loop;
-	unsigned int len;
-	unsigned char *cur;
-	unsigned int left;
-	unsigned int cur_time;
-	unsigned int loop_start;
-	int loop_set;
-} hmp_track;
-
-typedef struct hmp_file {
-	PHYSFS_sint64 filesize;
-	int num_trks;
-	hmp_track trks[HMP_TRACKS];
-	unsigned int cur_time;
-	unsigned int loop_start;
-	unsigned int loop_end;
-	int looping;
-	int tempo;
-#ifdef _WIN32
-	MIDIHDR *evbuf;
-	HMIDISTRM hmidi;
-	UINT devid;
-#endif
-	unsigned char *pending;
-	unsigned int pending_size;
-	unsigned int pending_event;
-	int stop;
-	int bufs_in_mm;
-	int bLoop;
-	unsigned int midi_division;
-} hmp_file;
-
-hmp_file *hmp_open(const char *filename);
-void hmp_close(hmp_file *hmp);
-void hmp2mid(char *hmp_name, unsigned char **midbuf, unsigned int *midlen);
-#ifdef _WIN32
-void hmp_setvolume(hmp_file *hmp, int volume);
-int hmp_play(hmp_file *hmp, int bLoop);
-void hmp_pause(hmp_file *hmp);
-void hmp_resume(hmp_file *hmp);
-void hmp_reset();
-#endif
-
-#endif