diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
index b2709c7..2e3169f 100644
--- a/drivers/ide/it821x.c
+++ b/drivers/ide/it821x.c
@@ -61,6 +61,7 @@
 
 #include <linux/types.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
 #include <linux/init.h>