diff --git a/include/asm-alpha/sembuf.h b/include/asm-alpha/sembuf.h
new file mode 100644
index 0000000..7b38b15
--- /dev/null
+++ b/include/asm-alpha/sembuf.h
@@ -0,0 +1,22 @@
+#ifndef _ALPHA_SEMBUF_H
+#define _ALPHA_SEMBUF_H
+
+/* 
+ * The semid64_ds structure for alpha architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 64-bit values
+ */
+
+struct semid64_ds {
+	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
+	__kernel_time_t	sem_otime;		/* last semop time */
+	__kernel_time_t	sem_ctime;		/* last change time */
+	unsigned long	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	__unused1;
+	unsigned long	__unused2;
+};
+
+#endif /* _ALPHA_SEMBUF_H */