diff --git a/app/src/main/java/com/example/tampopo_client/views/UserInfoActivity.java b/app/src/main/java/com/example/tampopo_client/views/UserInfoActivity.java
index 6d50809..cdcc4e3 100644
--- a/app/src/main/java/com/example/tampopo_client/views/UserInfoActivity.java
+++ b/app/src/main/java/com/example/tampopo_client/views/UserInfoActivity.java
@@ -114,9 +114,9 @@
                     app.setIcon(changeIconUrl);
                 }
 
-                if (usernicknameInput == null  && changeIconUrl == null) {
+                if (android.text.TextUtils.isEmpty(usernickname)  && changeIconUrl == null) {
                     Toast.makeText(UserInfoActivity.this, "ニックネームとアイコンを設定してください", Toast.LENGTH_SHORT).show();
-                }else if(usernicknameInput == null){
+                }else if(android.text.TextUtils.isEmpty(usernickname)){
                     Toast.makeText(UserInfoActivity.this, "ニックネームを入力してください", Toast.LENGTH_SHORT).show();
                 } else if (changeIconUrl == null) {
                     Toast.makeText(UserInfoActivity.this, "アイコンを設定してください", Toast.LENGTH_SHORT).show();