diff --git a/sound/soc/codecs/ad193x.c b/sound/soc/codecs/ad193x.c
index d034464e26ff..e10820670752 100644
--- a/sound/soc/codecs/ad193x.c
+++ b/sound/soc/codecs/ad193x.c
@@ -12,6 +12,7 @@
 #include <linux/device.h>
 #include <linux/i2c.h>
 #include <linux/spi/spi.h>
+#include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>