diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
index ef6431c6eb1ce..45600acc0f455 100644
--- a/drivers/firmware/arm_scmi/clock.c
+++ b/drivers/firmware/arm_scmi/clock.c
@@ -49,7 +49,7 @@ struct scmi_msg_resp_clock_describe_rates {
 	struct {
 		__le32 value_low;
 		__le32 value_high;
-	} rate[0];
+	} rate[];
 #define RATE_TO_U64(X)		\
 ({				\
 	typeof(X) x = (X);	\