diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c
index b68d99f..bdeb10d 100644
--- a/sound/soc/codecs/ak4104.c
+++ b/sound/soc/codecs/ak4104.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/soc.h>
 #include <sound/initval.h>