diff --git a/addons/mail/static/src/components/composer_suggested_recipient/composer_suggested_recipient.js b/addons/mail/static/src/components/composer_suggested_recipient/composer_suggested_recipient.js
index f981af8ea64..120b55aed57 100644
--- a/addons/mail/static/src/components/composer_suggested_recipient/composer_suggested_recipient.js
+++ b/addons/mail/static/src/components/composer_suggested_recipient/composer_suggested_recipient.js
@@ -62,7 +62,7 @@ export class ComposerSuggestedRecipient extends Component {
             return;
         }
         const isChecked = this._checkboxRef.el.checked;
-        this.composerSuggestedRecipientView.suggestedRecipientInfo.update({ isSelected: isChecked });
+        this.composerSuggestedRecipientView.suggestedRecipientInfo.update({ isChecked });
         if (!this.composerSuggestedRecipientView.suggestedRecipientInfo.partner) {
             // Recipients must always be partners. On selecting a suggested
             // recipient that does not have a partner, the partner creation form
diff --git a/addons/mail/static/src/models/suggested_recipient_info.js b/addons/mail/static/src/models/suggested_recipient_info.js
index 0c302897915..8c8ae962eb6 100644
--- a/addons/mail/static/src/models/suggested_recipient_info.js
+++ b/addons/mail/static/src/models/suggested_recipient_info.js
@@ -32,6 +32,12 @@ registerModel({
         id: attr({
             identifying: true,
         }),
+        /**
+         * Determines whether this suggested recipient has been checked on UI.
+         * A suggested recipient info is checked when current user manually set
+         * checkbox to "checked" value.
+         */
+        isChecked: attr(),
         /**
          * Determines whether `this` will be added to recipients when posting a
          * new message on `this.thread`.
@@ -41,7 +47,7 @@ registerModel({
              * Prevents selecting a recipient that does not have a partner.
              */
             compute() {
-                return this.partner ? this.isSelected : false;
+                return this.partner ? this.isChecked : false;
             },
             default: true,
         }),