diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index 8b0d2c4bde919fb9815903288acabb1afa9b63eb..06df898842c0026ae63a86641d8aa067271ff649 100644
--- a/drivers/regulator/wm831x-dcdc.c
+++ b/drivers/regulator/wm831x-dcdc.c
@@ -120,6 +120,7 @@ static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev)
 		return REGULATOR_MODE_IDLE;
 	default:
 		BUG();
+		return -EINVAL;
 	}
 }