diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 266b858..bedc6c1 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -74,6 +74,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/stat.h>
 #include <linux/tty.h>