diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index a423a38..765c017 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -22,6 +22,7 @@
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
+#include <linux/slab.h>
 #include <linux/mtd/mtd.h>
 
 #define ERROR(fmt, args...) printk(KERN_ERR "phram: " fmt , ## args)