diff --git a/drivers/mfd/arizona.h b/drivers/mfd/arizona.h
index 198e9cea77f9cdb9dce5540e0ec472c5276645bf..a0bddc5bd043aaceb4561a2b886d769b2b9a0e67 100644
--- a/drivers/mfd/arizona.h
+++ b/drivers/mfd/arizona.h
@@ -17,8 +17,6 @@
 #include <linux/regmap.h>
 #include <linux/pm.h>
 
-struct wm_arizona;
-
 extern const struct regmap_config wm5102_i2c_regmap;
 extern const struct regmap_config wm5102_spi_regmap;