diff --git a/qemu/hw/fm_def.h b/qemu/hw/fm_def.h
new file mode 100644
index 0000000..0382711
--- /dev/null
+++ b/qemu/hw/fm_def.h
@@ -0,0 +1,25 @@
+/* M.A.M.E. definitions used for YM2608 */
+
+#ifndef __FM_DEF_H__
+#define __FM_DEF_H__
+
+typedef unsigned char UINT8; /* unsigned 8bit */
+typedef unsigned short UINT16; /* unsigned 16bit */
+typedef unsigned int UINT32; /* unsigned 32bit */
+typedef signed char INT8; /* signed 8bit */
+typedef signed short INT16; /* signed 16bit */
+typedef signed int INT32; /* signed 32bit */
+
+typedef UINT8 (*mem_read_handler) (UINT32 offset);
+typedef void (*mem_write_handler) (UINT32 offset, UINT8 data);
+
+struct MachineSound {
+ int sound_type;
+ void *sound_interface;
+ const char *tag;
+};
+
+/* defined in ym2608intf.c */
+void YM2608UpdateRequest(int chip);
+
+#endif
