diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
index 0e4dce7..108c51a 100755
--- a/sound/soc/codecs/twl6040.c
+++ b/sound/soc/codecs/twl6040.c
@@ -27,6 +27,7 @@
 #include <linux/i2c.h>
 #include <linux/gpio.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include <linux/i2c/twl.h>
 
 #include <sound/core.h>