diff --git a/include/sound/util_mem.h b/include/sound/util_mem.h
index 9d2cdfa..69944bbb 100644
--- a/include/sound/util_mem.h
+++ b/include/sound/util_mem.h
@@ -20,29 +20,25 @@
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
-typedef struct snd_util_memblk snd_util_memblk_t;
-typedef struct snd_util_memhdr snd_util_memhdr_t;
-typedef unsigned int snd_util_unit_t;
-
 /*
  * memory block
  */
 struct snd_util_memblk {
-	snd_util_unit_t size;		/* size of this block */
-	snd_util_unit_t offset;		/* zero-offset of this block */
+	unsigned int size;		/* size of this block */
+	unsigned int offset;		/* zero-offset of this block */
 	struct list_head list;		/* link */
 };
 
-#define snd_util_memblk_argptr(blk)	(void*)((char*)(blk) + sizeof(snd_util_memblk_t))
+#define snd_util_memblk_argptr(blk)	(void*)((char*)(blk) + sizeof(struct snd_util_memblk))
 
 /*
  * memory management information
  */
 struct snd_util_memhdr {
-	snd_util_unit_t size;		/* size of whole data */
+	unsigned int size;		/* size of whole data */
 	struct list_head block;		/* block linked-list header */
 	int nblocks;			/* # of allocated blocks */
-	snd_util_unit_t used;		/* used memory size */
+	unsigned int used;		/* used memory size */
 	int block_extra_size;		/* extra data size of chunk */
 	struct semaphore block_mutex;	/* lock */
 };
@@ -50,15 +46,17 @@
 /*
  * prototypes
  */
-snd_util_memhdr_t *snd_util_memhdr_new(int memsize);
-void snd_util_memhdr_free(snd_util_memhdr_t *hdr);
-snd_util_memblk_t *snd_util_mem_alloc(snd_util_memhdr_t *hdr, int size);
-int snd_util_mem_free(snd_util_memhdr_t *hdr, snd_util_memblk_t *blk);
-int snd_util_mem_avail(snd_util_memhdr_t *hdr);
+struct snd_util_memhdr *snd_util_memhdr_new(int memsize);
+void snd_util_memhdr_free(struct snd_util_memhdr *hdr);
+struct snd_util_memblk *snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size);
+int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk);
+int snd_util_mem_avail(struct snd_util_memhdr *hdr);
 
 /* functions without mutex */
-snd_util_memblk_t *__snd_util_mem_alloc(snd_util_memhdr_t *hdr, int size);
-void __snd_util_mem_free(snd_util_memhdr_t *hdr, snd_util_memblk_t *blk);
-snd_util_memblk_t *__snd_util_memblk_new(snd_util_memhdr_t *hdr, snd_util_unit_t units, struct list_head *prev);
+struct snd_util_memblk *__snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size);
+void __snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk);
+struct snd_util_memblk *__snd_util_memblk_new(struct snd_util_memhdr *hdr,
+					      unsigned int units,
+					      struct list_head *prev);
 
 #endif /* __SOUND_UTIL_MEM_H */