diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
index 042c814..1144a04 100644
--- a/drivers/char/viotape.c
+++ b/drivers/char/viotape.c
@@ -47,6 +47,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/smp_lock.h>
+#include <linux/slab.h>
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>