diff --git a/uloop.c b/uloop.c
index aa09750..bd09260 100644
--- a/uloop.c
+++ b/uloop.c
@@ -341,7 +341,7 @@ int uloop_timeout_set(struct uloop_timeout *timeout, int msecs)
 	gettimeofday(&timeout->time, NULL);
 
 	time->tv_sec += msecs / 1000;
-	time->tv_usec += msecs % 1000;
+	time->tv_usec += (msecs % 1000) * 1000;
 
 	if (time->tv_usec > 1000000) {
 		time->tv_sec++;