diff --git a/drivers/staging/greybus/pwm.c b/drivers/staging/greybus/pwm.c
index 3f508bf66ec0..4e38b8a4624e 100644
--- a/drivers/staging/greybus/pwm.c
+++ b/drivers/staging/greybus/pwm.c
@@ -56,8 +56,8 @@ struct gb_pwm_deactivate_request {
 
 struct gb_pwm_config_request {
 	__u8	which;
-	__le32	duty;
-	__le32	period;
+	__le32	duty __packed;
+	__le32	period __packed;
 };
 
 struct gb_pwm_polarity_request {