diff --git a/src/plugins/coordinate_capture/coordinatecapture.cpp b/src/plugins/coordinate_capture/coordinatecapture.cpp
index e45058b5801..f2e674c74d7 100644
--- a/src/plugins/coordinate_capture/coordinatecapture.cpp
+++ b/src/plugins/coordinate_capture/coordinatecapture.cpp
@@ -34,7 +34,7 @@
 #include "coordinatecapturegui.h"
 
 //
-// Qt4 Related Includes
+// Qt Related Includes
 //
 
 #include <QAction>
diff --git a/src/plugins/coordinate_capture/coordinatecapture.h b/src/plugins/coordinate_capture/coordinatecapture.h
index e2e3ac24f04..1c56a885b69 100644
--- a/src/plugins/coordinate_capture/coordinatecapture.h
+++ b/src/plugins/coordinate_capture/coordinatecapture.h
@@ -35,7 +35,7 @@
 #ifndef COORDINATECAPTURE_H
 #define COORDINATECAPTURE_H
 
-//QT4 includes
+//QT includes
 #include <QObject>
 #include <QPointer>
 
diff --git a/src/plugins/evis/evis.cpp b/src/plugins/evis/evis.cpp
index a2e76c29bfa..3b94c863591 100644
--- a/src/plugins/evis/evis.cpp
+++ b/src/plugins/evis/evis.cpp
@@ -62,7 +62,7 @@
 #include "eviseventidtool.h"
 
 //
-// Qt4 Related Includes
+// Qt Related Includes
 //
 #include <QMessageBox>
 #include <QToolBar>
diff --git a/src/plugins/grass/qgsgrasstools.cpp b/src/plugins/grass/qgsgrasstools.cpp
index a49d56c2410..92fe6d26f18 100644
--- a/src/plugins/grass/qgsgrasstools.cpp
+++ b/src/plugins/grass/qgsgrasstools.cpp
@@ -220,7 +220,7 @@ void QgsGrassTools::runModule( QString name, bool direct )
 
   if ( !pixmap.isNull() )
   {
-    // Icon size in QT4 does not seem to be variable
+    // Icon size in QT does not seem to be variable
     // -> reset the width to max icon width
     if ( mTabWidget->iconSize().width() < pixmap.width() )
     {
diff --git a/src/plugins/plugin_template/plugin.h b/src/plugins/plugin_template/plugin.h
index 4a4b2d3f7de..b8bf8a84c6e 100644
--- a/src/plugins/plugin_template/plugin.h
+++ b/src/plugins/plugin_template/plugin.h
@@ -35,7 +35,7 @@
 #ifndef [pluginname]_H
 #define [pluginname]_H
 
-//QT4 includes
+//QT includes
 #include <QObject>
 
 //QGIS includes
diff --git a/src/plugins/topology/topol.cpp b/src/plugins/topology/topol.cpp
index a673207371a..18880e5c9b6 100644
--- a/src/plugins/topology/topol.cpp
+++ b/src/plugins/topology/topol.cpp
@@ -21,7 +21,7 @@
 #include "qgisinterface.h"
 #include "qgsguiutils.h"
 
-// Qt4 Related Includes
+// Qt Related Includes
 #include <QAction>
 #include <QToolBar>
 #include <QFile>
diff --git a/src/plugins/topology/topol.h b/src/plugins/topology/topol.h
index 6262e7d8874..895ec8acce1 100644
--- a/src/plugins/topology/topol.h
+++ b/src/plugins/topology/topol.h
@@ -36,7 +36,7 @@
 #ifndef TOPOL_H
 #define TOPOL_H
 
-//QT4 includes
+//QT includes
 #include <QObject>
 
 //QGIS includes
diff --git a/src/python/qgspythonutilsimpl.cpp b/src/python/qgspythonutilsimpl.cpp
index f5673374a16..ca8ebbad8c3 100644
--- a/src/python/qgspythonutilsimpl.cpp
+++ b/src/python/qgspythonutilsimpl.cpp
@@ -110,7 +110,7 @@ bool QgsPythonUtilsImpl::checkSystemImports()
     return false;
   }
 
-  // set PyQt4 api versions
+  // set PyQt api versions
   QStringList apiV2classes;
   apiV2classes << QStringLiteral( "QDate" ) << QStringLiteral( "QDateTime" ) << QStringLiteral( "QString" ) << QStringLiteral( "QTextStream" ) << QStringLiteral( "QTime" ) << QStringLiteral( "QUrl" ) << QStringLiteral( "QVariant" );
   Q_FOREACH ( const QString &clsName, apiV2classes )