diff --git a/loop.go b/loop.go
index d00bb9a..3f236fe 100644
--- a/loop.go
+++ b/loop.go
@@ -27,9 +27,8 @@ func NewLoop(interval time.Duration) *Loop {
 }
 
 // SetInterval allows to change the interval before starting.
-// The interval is specified in milliseconds. 1 sec = 1000 millisec.
 func (loop *Loop) SetInterval(interval time.Duration) {
-	loop.interval = interval * time.Millisecond
+	loop.interval = interval
 }
 
 // SetNextTickDuration allows to change the next tick duration after starting.