diff --git a/mainwindow.cc b/mainwindow.cc
index 3ad8e914..7a1050e8 100644
--- a/mainwindow.cc
+++ b/mainwindow.cc
@@ -677,11 +677,11 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
   connect( ui.showReference, SIGNAL( triggered() ),
            this, SLOT( showGDHelp() ) );
 
-  connect( groupListInDock, SIGNAL( currentIndexChanged( QString const & ) ),
-           this, SLOT( currentGroupChanged( QString const & ) ) );
+  connect( groupListInDock, &GroupComboBox::currentIndexChanged,
+           this, &MainWindow::currentGroupChanged );
 
-  connect( groupListInToolbar, SIGNAL( currentIndexChanged( QString const & ) ),
-           this, SLOT( currentGroupChanged( QString const & ) ) );
+  connect( groupListInToolbar, &GroupComboBox::currentIndexChanged,
+           this, &MainWindow::currentGroupChanged );
 
   connect( ui.translateLine, SIGNAL( textChanged( QString const & ) ),
            this, SLOT( translateInputChanged( QString const & ) ) );
@@ -1391,8 +1391,8 @@ void MainWindow::updateGroupList()
 
   // currentIndexChanged() signal is very trigger-happy. To avoid triggering
   // it, we disconnect it while we're clearing and filling back groups.
-  disconnect( groupList, SIGNAL( currentIndexChanged( QString const & ) ),
-              this, SLOT( currentGroupChanged( QString const & ) ) );
+  disconnect( groupList, &GroupComboBox::currentIndexChanged,
+              this, &MainWindow::currentGroupChanged );
 
   groupInstances.clear();
 
@@ -1437,8 +1437,8 @@ void MainWindow::updateGroupList()
     view.reload();
   }
 
-  connect( groupList, SIGNAL( currentIndexChanged( QString const & ) ),
-           this, SLOT( currentGroupChanged( QString const & ) ) );
+  connect( groupList, &GroupComboBox::currentIndexChanged,
+           this, &MainWindow::currentGroupChanged );
 }
 
 void MainWindow::updateDictionaryBar()
@@ -2255,7 +2255,7 @@ void MainWindow::editPreferences()
   ftsIndexing.doIndexing();
 }
 
-void MainWindow::currentGroupChanged( QString const & )
+void MainWindow::currentGroupChanged( int )
 {
   cfg.lastMainGroupId = groupList->getCurrentGroup();
   Instances::Group const * igrp = groupInstances.findGroup( cfg.lastMainGroupId );
@@ -3740,8 +3740,8 @@ void MainWindow::applyWordsZoomLevel()
 
   if ( groupList->font().pointSize() != ps )
   {
-    disconnect( groupList, SIGNAL( currentIndexChanged( QString const & ) ),
-                this, SLOT( currentGroupChanged( QString const & ) ) );
+    disconnect( groupList, &GroupComboBox::currentIndexChanged,
+                this, &MainWindow::currentGroupChanged );
     int n = groupList->currentIndex();
     groupList->clear();
     groupList->setFont( font );
diff --git a/mainwindow.hh b/mainwindow.hh
index 3cab316a..cf77a657 100644
--- a/mainwindow.hh
+++ b/mainwindow.hh
@@ -377,7 +377,7 @@ private slots:
   void editCurrentGroup();
   void editPreferences();
 
-  void currentGroupChanged( QString const & );
+  void currentGroupChanged( int );
   void translateInputChanged( QString const & );
   void translateInputFinished( bool checkModifiers = true );
 
diff --git a/scanpopup.cc b/scanpopup.cc
index 01ef02f8..c0d3ea07 100644
--- a/scanpopup.cc
+++ b/scanpopup.cc
@@ -254,8 +254,8 @@ ScanPopup::ScanPopup( QWidget * parent,
   connect( &switchExpandModeAction, SIGNAL( triggered() ),
            this, SLOT(switchExpandOptionalPartsMode() ) );
 
-  connect( ui.groupList, SIGNAL( currentIndexChanged( QString const & ) ),
-           this, SLOT( currentGroupChanged( QString const & ) ) );
+  connect( ui.groupList, &QComboBox::currentIndexChanged,
+           this, &ScanPopup::currentGroupChanged);
 
   connect( &wordFinder, SIGNAL( finished() ),
            this, SLOT( prefixMatchFinished() ) );
@@ -717,8 +717,7 @@ QString ScanPopup::elideInputWord()
   QString const & inputWord = inputPhrase.phrase;
   return inputWord.size() > 32 ? inputWord.mid( 0, 32 ) + "..." : inputWord;
 }
-
-void ScanPopup::currentGroupChanged( QString const & )
+void ScanPopup::currentGroupChanged( int )
 {
     cfg.lastPopupGroupId = ui.groupList->getCurrentGroup();
     Instances::Group const * igrp = groups.findGroup( cfg.lastPopupGroupId );
diff --git a/scanpopup.hh b/scanpopup.hh
index 3ee7d05a..e081ae0a 100644
--- a/scanpopup.hh
+++ b/scanpopup.hh
@@ -194,7 +194,7 @@ private:
 private slots:
   void clipboardChanged( QClipboard::Mode );
   void mouseHovered( QString const & , bool forcePopup);
-  void currentGroupChanged( QString const & );
+  void currentGroupChanged( int );
   void prefixMatchFinished();
   void on_pronounceButton_clicked();
   void pinButtonClicked( bool checked );