diff --git a/include/sound/asound.h b/include/sound/asound.h
index 3eaf155..e3b9c2d 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -241,8 +241,14 @@ typedef int __bitwise snd_pcm_subformat_t;
 #define	SNDRV_PCM_SUBFORMAT_STD		((__force snd_pcm_subformat_t) 0)
 #define	SNDRV_PCM_SUBFORMAT_LAST	SNDRV_PCM_SUBFORMAT_STD
 
+#ifdef CONFIG_ALPHA_DP264
+#define SNDRV_PCM_INFO_MMAP		0		/* the useful comment goes here */
+#define SNDRV_PCM_INFO_MMAP_VALID	0
+#else
 #define SNDRV_PCM_INFO_MMAP		0x00000001	/* hardware supports mmap */
 #define SNDRV_PCM_INFO_MMAP_VALID	0x00000002	/* period data are valid during transfer */
+#endif
+
 #define SNDRV_PCM_INFO_DOUBLE		0x00000004	/* Double buffering needed for PCM start/stop */
 #define SNDRV_PCM_INFO_BATCH		0x00000010	/* double buffering */
 #define SNDRV_PCM_INFO_INTERLEAVED	0x00000100	/* channels are interleaved */