diff --git a/src/qt/qvalidatedlineedit.cpp b/src/qt/qvalidatedlineedit.cpp
index 3fa243d870..b9967612f0 100644
--- a/src/qt/qvalidatedlineedit.cpp
+++ b/src/qt/qvalidatedlineedit.cpp
@@ -1,99 +1,100 @@
 // Copyright (c) 2011-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <qt/qvalidatedlineedit.h>
 
 #include <qt/bitcoinaddressvalidator.h>
 #include <qt/guiconstants.h>
 
 QValidatedLineEdit::QValidatedLineEdit(QWidget *parent)
     : QLineEdit(parent), valid(true), checkValidator(0) {
-    connect(this, SIGNAL(textChanged(QString)), this, SLOT(markValid()));
+    connect(this, &QValidatedLineEdit::textChanged, this,
+            &QValidatedLineEdit::markValid);
 }
 
 void QValidatedLineEdit::setValid(bool _valid) {
     if (_valid == this->valid) {
         return;
     }
 
     if (_valid) {
         setStyleSheet("");
     } else {
         setStyleSheet(STYLE_INVALID);
     }
     this->valid = _valid;
 }
 
 void QValidatedLineEdit::focusInEvent(QFocusEvent *evt) {
     // Clear invalid flag on focus
     setValid(true);
 
     QLineEdit::focusInEvent(evt);
 }
 
 void QValidatedLineEdit::focusOutEvent(QFocusEvent *evt) {
     checkValidity();
 
     QLineEdit::focusOutEvent(evt);
 }
 
 void QValidatedLineEdit::markValid() {
     // As long as a user is typing ensure we display state as valid
     setValid(true);
 }
 
 void QValidatedLineEdit::clear() {
     setValid(true);
     QLineEdit::clear();
 }
 
 void QValidatedLineEdit::setEnabled(bool enabled) {
     if (!enabled) {
         // A disabled QValidatedLineEdit should be marked valid
         setValid(true);
     } else {
         // Recheck validity when QValidatedLineEdit gets enabled
         checkValidity();
     }
 
     QLineEdit::setEnabled(enabled);
 }
 
 void QValidatedLineEdit::checkValidity() {
     if (text().isEmpty()) {
         setValid(true);
     } else if (hasAcceptableInput()) {
         setValid(true);
 
         // Check contents on focus out
         if (checkValidator) {
             QString address = text();
             int pos = 0;
             if (checkValidator->validate(address, pos) ==
                 QValidator::Acceptable)
                 setValid(true);
             else
                 setValid(false);
         }
     } else
         setValid(false);
 
     Q_EMIT validationDidChange(this);
 }
 
 void QValidatedLineEdit::setCheckValidator(const QValidator *v) {
     checkValidator = v;
 }
 
 bool QValidatedLineEdit::isValid() {
     // use checkValidator in case the QValidatedLineEdit is disabled
     if (checkValidator) {
         QString address = text();
         int pos = 0;
         if (checkValidator->validate(address, pos) == QValidator::Acceptable)
             return true;
     }
 
     return valid;
 }