diff --git a/sound/soc/codecs/wm8727.c b/sound/soc/codecs/wm8727.c
index 63a254e..1072621 100644
--- a/sound/soc/codecs/wm8727.c
+++ b/sound/soc/codecs/wm8727.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>