diff --git a/bzGraflow.js b/bzGraflow.js
index 78bc95c..7585c03 100644
--- a/bzGraflow.js
+++ b/bzGraflow.js
@@ -511,11 +511,11 @@ class BZgraflow extends Buildoz{
             this.fireEvent('refreshed', { })
             if(this.hasAttribute('autofit')){
                 const autofitAttr = this.getAttribute('autofit')
-                const autofitTween = (autofitAttr !== null && autofitAttr !== '' && !Number.isNaN(parseFloat(autofitAttr)))
+                const autofitPerc = (autofitAttr !== null && autofitAttr !== '' && !Number.isNaN(parseFloat(autofitAttr)))
                     ? parseFloat(autofitAttr)
                     : undefined
-                if(this._canRunAutoPlace()) this.autofit(autofitTween)
-                else this._scheduleLayoutWhenReady(() => this.autofit(autofitTween))
+                if(this._canRunAutoPlace()) this.autofit(autofitPerc)
+                else this._scheduleLayoutWhenReady(() => this.autofit(autofitPerc))
             }
         }
         const onLayoutComplete = () => {
@@ -1332,7 +1332,7 @@ class BZgraflow extends Buildoz{
         return(crossLayerLinks)
     }
 
-    autofit(tween = 0, percent=100){
+    autofit(percent=100){
         const outwidth = Math.max(this.clientWidth, 1)
         const outheight = Math.max(this.clientHeight, 1)
         let inwidth = this.nodesContainer.scrollWidth
@@ -1347,6 +1347,7 @@ class BZgraflow extends Buildoz{
             return 
         }
         const ratio = Math.min( (outwidth / inwidth), (outheight / inheight) ) * (percent / 100)
+        const tween = parseInt(this.getBZAttribute('tween')) || 0
         if(tween > 0){
             const transition = `scale ${tween}ms ease-in-out`
             this.nodesContainer.style.transition = transition