diff --git a/drivers/mfd/timberdale.c b/drivers/mfd/timberdale.c
index 1ed44d2..7f478ec 100644
--- a/drivers/mfd/timberdale.c
+++ b/drivers/mfd/timberdale.c
@@ -25,6 +25,7 @@
 #include <linux/pci.h>
 #include <linux/msi.h>
 #include <linux/mfd/core.h>
+#include <linux/slab.h>
 
 #include <linux/timb_gpio.h>