diff --git a/drivers/firmware/arm_scmi/base.c b/drivers/firmware/arm_scmi/base.c
index 017e5d8bd869..e51d28ba2833 100644
--- a/drivers/firmware/arm_scmi/base.c
+++ b/drivers/firmware/arm_scmi/base.c
@@ -188,7 +188,7 @@ static int scmi_base_implementation_list_get(const struct scmi_handle *handle,
 			break;
 
 		loop_num_ret = le32_to_cpu(*num_ret);
-		if (tot_num_ret + loop_num_ret > MAX_PROTOCOLS_IMP) {
+		if (loop_num_ret > MAX_PROTOCOLS_IMP - tot_num_ret) {
 			dev_err(dev, "No. of Protocol > MAX_PROTOCOLS_IMP");
 			break;
 		}