diff --git a/src/webapp.jsx b/src/webapp.jsx
index c95acf1a..70511587 100644
--- a/src/webapp.jsx
+++ b/src/webapp.jsx
@@ -2281,7 +2281,7 @@ class GroupManager extends React.Component {
     var m = this.state.members.slice();
     m.push(this.props.contacts[index]);
 
-    var sel = this.selectedContacts(m);
+    var sel = GroupManager.selectedContacts(m);
 
     var i = this.state.index;
     i[userId] = status;
@@ -2300,7 +2300,7 @@ class GroupManager extends React.Component {
     var m = this.state.members.slice();
     m.splice(index, 1);
 
-    var sel = this.selectedContacts(m);
+    var sel = GroupManager.selectedContacts(m);
 
     var i = this.state.index;
     i[userId] = status;