diff --git a/daemon/control_ng.c b/daemon/control_ng.c
index 2df4d31e8..44eddaa4b 100644
--- a/daemon/control_ng.c
+++ b/daemon/control_ng.c
@@ -863,7 +863,7 @@ static void control_ng_process_payload(ng_ctx *hctx, str *reply, str *data, cons
 	// stop command timer
 	gettimeofday(&cmd_stop, NULL);
 	//print command duration
-	timeval_from_us(&cmd_process_time, timeval_diff(&cmd_stop, &cmd_start));
+	timeval_subtract(&cmd_process_time, &cmd_stop, &cmd_start);
 
 	if (command_ctx.opmode >= 0 && command_ctx.opmode < OP_COUNT) {
 		mutex_lock(&cur->cmd[command_ctx.opmode].lock);