diff --git a/public/react/src/modules/courses/members/teacherList.js b/public/react/src/modules/courses/members/teacherList.js
index bb344de38..02fab16a9 100644
--- a/public/react/src/modules/courses/members/teacherList.js
+++ b/public/react/src/modules/courses/members/teacherList.js
@@ -227,6 +227,7 @@ class studentsList extends Component{
   }
   componentWillUnmount() {
     off('addTeacherSuccess', this.addTeacherSuccessListener)
+    const isAdmin = this.props.isAdmin()
     isAdmin && off('updateNavSuccess', this.updateNavSuccess)
   }
   updateNavSuccess = () => {