diff --git a/src/member/MemberPicker.js b/src/member/MemberPicker.js
index 2bba4148f9e7929bda9c8b6203b0f4835957d2fb..6b714ae9e783432ee8005ecc3933088e16834a21 100644
--- a/src/member/MemberPicker.js
+++ b/src/member/MemberPicker.js
@@ -10,6 +10,9 @@ function MemberPicker(props) {
   const setMembers = (members) => {
     const newMembers = members.map((m) => {
       m.numStr = m.num.toString();
+      if (!m.login) {
+        m.login = "";
+      }
       return m;
     });
     setStateMembers(newMembers);