diff --git a/sound/oss/uart401.c b/sound/oss/uart401.c
index a446b82..8e514a6 100644
--- a/sound/oss/uart401.c
+++ b/sound/oss/uart401.c
@@ -24,6 +24,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include "sound_config.h"