diff --git a/include/linux/libps2.h b/include/linux/libps2.h
index 79603a6..4ad06e8 100644
--- a/include/linux/libps2.h
+++ b/include/linux/libps2.h
@@ -36,7 +36,7 @@
 	wait_queue_head_t wait;
 
 	unsigned long flags;
-	unsigned char cmdbuf[6];
+	unsigned char cmdbuf[8];
 	unsigned char cmdcnt;
 	unsigned char nak;
 };