diff --git a/addons/mrp/static/src/widgets/timer.js b/addons/mrp/static/src/widgets/timer.js
index dc5ac3fe109..feaedccb48b 100644
--- a/addons/mrp/static/src/widgets/timer.js
+++ b/addons/mrp/static/src/widgets/timer.js
@@ -67,7 +67,8 @@ export class MrpTimer extends Component {
     }
 
     get durationFormatted() {
-        if(this.props.value!=this.state.duration && this.props.record && !this.readonly){
+        if(this.props.value!=this.state.duration && this.props.record && this.props.record.isDirty){
+            if (typeof this.props.setDirty==='function')this.props.setDirty(false);
             this.state.duration=this.props.value
         }
         return formatMinutes(this.state.duration);