diff --git a/src/qt/askpassphrasedialog.cpp b/src/qt/askpassphrasedialog.cpp
index 3b4967421a7..3be8b664ddb 100644
--- a/src/qt/askpassphrasedialog.cpp
+++ b/src/qt/askpassphrasedialog.cpp
@@ -199,6 +199,8 @@ void AskPassphraseDialog::textChanged()
         acceptable = !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
         break;
     case Unlock: // Old passphrase x1
+        acceptable = !ui->passEdit1->text().isEmpty();
+        break;
     case ChangePass: // Old passphrase x1, new passphrase x2
         acceptable = !ui->passEdit1->text().isEmpty() && !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
         break;