diff --git a/hw/audio/ac97.c b/hw/audio/ac97.c
index b3a45bb49f..c2a5ce062a 100644
--- a/hw/audio/ac97.c
+++ b/hw/audio/ac97.c
@@ -26,43 +26,7 @@
 #include "qemu/module.h"
 #include "sysemu/dma.h"
 #include "qom/object.h"
-
-enum {
-    AC97_Reset                     = 0x00,
-    AC97_Master_Volume_Mute        = 0x02,
-    AC97_Headphone_Volume_Mute     = 0x04,
-    AC97_Master_Volume_Mono_Mute   = 0x06,
-    AC97_Master_Tone_RL            = 0x08,
-    AC97_PC_BEEP_Volume_Mute       = 0x0A,
-    AC97_Phone_Volume_Mute         = 0x0C,
-    AC97_Mic_Volume_Mute           = 0x0E,
-    AC97_Line_In_Volume_Mute       = 0x10,
-    AC97_CD_Volume_Mute            = 0x12,
-    AC97_Video_Volume_Mute         = 0x14,
-    AC97_Aux_Volume_Mute           = 0x16,
-    AC97_PCM_Out_Volume_Mute       = 0x18,
-    AC97_Record_Select             = 0x1A,
-    AC97_Record_Gain_Mute          = 0x1C,
-    AC97_Record_Gain_Mic_Mute      = 0x1E,
-    AC97_General_Purpose           = 0x20,
-    AC97_3D_Control                = 0x22,
-    AC97_AC_97_RESERVED            = 0x24,
-    AC97_Powerdown_Ctrl_Stat       = 0x26,
-    AC97_Extended_Audio_ID         = 0x28,
-    AC97_Extended_Audio_Ctrl_Stat  = 0x2A,
-    AC97_PCM_Front_DAC_Rate        = 0x2C,
-    AC97_PCM_Surround_DAC_Rate     = 0x2E,
-    AC97_PCM_LFE_DAC_Rate          = 0x30,
-    AC97_PCM_LR_ADC_Rate           = 0x32,
-    AC97_MIC_ADC_Rate              = 0x34,
-    AC97_6Ch_Vol_C_LFE_Mute        = 0x36,
-    AC97_6Ch_Vol_L_R_Surround_Mute = 0x38,
-    AC97_Vendor_Reserved           = 0x58,
-    AC97_Sigmatel_Analog           = 0x6c, /* We emulate a Sigmatel codec */
-    AC97_Sigmatel_Dac2Invert       = 0x6e, /* We emulate a Sigmatel codec */
-    AC97_Vendor_ID1                = 0x7c,
-    AC97_Vendor_ID2                = 0x7e
-};
+#include "ac97.h"
 
 #define SOFT_VOLUME
 #define SR_FIFOE 16             /* rwc */
@@ -121,11 +85,6 @@ enum {
 #define BD_IOC (1 << 31)
 #define BD_BUP (1 << 30)
 
-#define EACS_VRA 1
-#define EACS_VRM 8
-
-#define MUTE_SHIFT 15
-
 #define TYPE_AC97 "AC97"
 OBJECT_DECLARE_SIMPLE_TYPE(AC97LinkState, AC97)
 
diff --git a/hw/audio/ac97.h b/hw/audio/ac97.h
new file mode 100644
index 0000000000..0358b56ff4
--- /dev/null
+++ b/hw/audio/ac97.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2006 InnoTek Systemberatung GmbH
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License as published by the Free Software Foundation,
+ * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
+ * distribution. VirtualBox OSE is distributed in the hope that it will
+ * be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * If you received this file as part of a commercial VirtualBox
+ * distribution, then only the terms of your commercial VirtualBox
+ * license agreement apply instead of the previous paragraph.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#ifndef AC97_H
+#define AC97_H
+
+enum {
+    AC97_Reset                     = 0x00,
+    AC97_Master_Volume_Mute        = 0x02,
+    AC97_Headphone_Volume_Mute     = 0x04,
+    AC97_Master_Volume_Mono_Mute   = 0x06,
+    AC97_Master_Tone_RL            = 0x08,
+    AC97_PC_BEEP_Volume_Mute       = 0x0A,
+    AC97_Phone_Volume_Mute         = 0x0C,
+    AC97_Mic_Volume_Mute           = 0x0E,
+    AC97_Line_In_Volume_Mute       = 0x10,
+    AC97_CD_Volume_Mute            = 0x12,
+    AC97_Video_Volume_Mute         = 0x14,
+    AC97_Aux_Volume_Mute           = 0x16,
+    AC97_PCM_Out_Volume_Mute       = 0x18,
+    AC97_Record_Select             = 0x1A,
+    AC97_Record_Gain_Mute          = 0x1C,
+    AC97_Record_Gain_Mic_Mute      = 0x1E,
+    AC97_General_Purpose           = 0x20,
+    AC97_3D_Control                = 0x22,
+    AC97_AC_97_RESERVED            = 0x24,
+    AC97_Powerdown_Ctrl_Stat       = 0x26,
+    AC97_Extended_Audio_ID         = 0x28,
+    AC97_Extended_Audio_Ctrl_Stat  = 0x2A,
+    AC97_PCM_Front_DAC_Rate        = 0x2C,
+    AC97_PCM_Surround_DAC_Rate     = 0x2E,
+    AC97_PCM_LFE_DAC_Rate          = 0x30,
+    AC97_PCM_LR_ADC_Rate           = 0x32,
+    AC97_MIC_ADC_Rate              = 0x34,
+    AC97_6Ch_Vol_C_LFE_Mute        = 0x36,
+    AC97_6Ch_Vol_L_R_Surround_Mute = 0x38,
+    AC97_Vendor_Reserved           = 0x58,
+    AC97_Sigmatel_Analog           = 0x6c, /* We emulate a Sigmatel codec */
+    AC97_Sigmatel_Dac2Invert       = 0x6e, /* We emulate a Sigmatel codec */
+    AC97_Vendor_ID1                = 0x7c,
+    AC97_Vendor_ID2                = 0x7e
+};
+
+#define EACS_VRA 1
+#define EACS_VRM 8
+
+#define MUTE_SHIFT 15
+
+#endif /* AC97_H */
