diff --git a/plugins/Common/retroshare_plugin.pri b/plugins/Common/retroshare_plugin.pri
index 16ac6d1ce..1febf21aa 100644
--- a/plugins/Common/retroshare_plugin.pri
+++ b/plugins/Common/retroshare_plugin.pri
@@ -10,8 +10,10 @@ linux-g++-64 {
 }
 
 win32 {
-	# from Qt 4.7.4 and 4.8+ the mkspecs has changed making dyn libs unusable anymore on windows : QMAKE_LFLAGS =
-	QMAKE_LFLAGS = -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc
+	lessThan(QT_MAJOR_VERSION, 5) {
+		# from Qt 4.7.4 and 4.8+ the mkspecs has changed making dyn libs unusable anymore on windows : QMAKE_LFLAGS =
+		QMAKE_LFLAGS = -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc
+	}
 
 	# Switch on extra warnings
 	QMAKE_CFLAGS += -Wextra
@@ -22,7 +24,7 @@ win32 {
 	RCC_DIR = temp/qrc
 	UI_DIR  = temp/ui
 
-	DEFINES += WINDOWS_SYS WIN32 STATICLIB MINGW
+	DEFINES += WINDOWS_SYS WIN32 STATICLIB MINGW WIN32_LEAN_AND_MEAN _USE_32BIT_TIME_T
 	DEFINES += MINIUPNPC_VERSION=13
 #	DESTDIR = lib
 
diff --git a/plugins/FeedReader/FeedReader.pro b/plugins/FeedReader/FeedReader.pro
index e376a7556..ff2a09500 100644
--- a/plugins/FeedReader/FeedReader.pro
+++ b/plugins/FeedReader/FeedReader.pro
@@ -2,6 +2,11 @@
 
 CONFIG += qt uic qrc resources
 
+greaterThan(QT_MAJOR_VERSION, 4) {
+	# Qt 5
+	QT += widgets
+}
+
 SOURCES =	FeedReaderPlugin.cpp \
 			services/p3FeedReader.cc \
 			services/p3FeedReaderThread.cc \
diff --git a/plugins/FeedReader/gui/FeedReaderMessageWidget.cpp b/plugins/FeedReader/gui/FeedReaderMessageWidget.cpp
index eb9472179..24e88fe1d 100644
--- a/plugins/FeedReader/gui/FeedReaderMessageWidget.cpp
+++ b/plugins/FeedReader/gui/FeedReaderMessageWidget.cpp
@@ -15,6 +15,7 @@
 #include "gui/common/RSTreeWidgetItem.h"
 #include "gui/settings/rsharesettings.h"
 #include "util/HandleRichText.h"
+#include "util/QtVersion.h"
 
 #include "retroshare/rsiface.h"
 
@@ -78,7 +79,7 @@ FeedReaderMessageWidget::FeedReaderMessageWidget(const std::string &feedId, RsFe
 
 	/* set header resize modes and initial section sizes */
 	QHeaderView *header = ui->msgTreeWidget->header();
-	header->setResizeMode(COLUMN_MSG_TITLE, QHeaderView::Interactive);
+	QHeaderView_setSectionResizeMode(header, COLUMN_MSG_TITLE, QHeaderView::Interactive);
 	header->resizeSection(COLUMN_MSG_TITLE, 350);
 	header->resizeSection(COLUMN_MSG_PUBDATE, 140);
 	header->resizeSection(COLUMN_MSG_AUTHOR, 150);
@@ -98,7 +99,7 @@ FeedReaderMessageWidget::FeedReaderMessageWidget(const std::string &feedId, RsFe
 
 	/* Set header sizes for the fixed columns and resize modes, must be set after processSettings */
 	header->resizeSection(COLUMN_MSG_READ, 24);
-	header->setResizeMode(COLUMN_MSG_READ, QHeaderView::Fixed);
+	QHeaderView_setSectionResizeMode(header, COLUMN_MSG_READ, QHeaderView::Fixed);
 
 	/* build menu for link button */
 	QMenu *menu = new QMenu(this);
diff --git a/plugins/LinksCloud/LinksCloud.pro b/plugins/LinksCloud/LinksCloud.pro
index f22e87337..1d0ab9253 100644
--- a/plugins/LinksCloud/LinksCloud.pro
+++ b/plugins/LinksCloud/LinksCloud.pro
@@ -2,6 +2,11 @@
 
 CONFIG += qt uic qrc resources
 
+greaterThan(QT_MAJOR_VERSION, 4) {
+	# Qt 5
+	QT += widgets
+}
+
 SOURCES = p3ranking.cc LinksDialog.cpp rsrankitems.cc AddLinksDialog.cpp LinksCloudPlugin.cpp
 HEADERS = rsrank.h p3ranking.h LinksDialog.h rsrankitems.h AddLinksDialog.h LinksCloudPlugin.h
 FORMS   = LinksDialog.ui AddLinksDialog.ui
diff --git a/plugins/LinksCloud/LinksDialog.cpp b/plugins/LinksCloud/LinksDialog.cpp
index 477cea063..8cce40f76 100644
--- a/plugins/LinksCloud/LinksDialog.cpp
+++ b/plugins/LinksCloud/LinksDialog.cpp
@@ -28,6 +28,7 @@
 #include <gui/RetroShareLink.h>
 #include "AddLinksDialog.h"
 #include "rsrank.h"
+#include "util/QtVersion.h"
 
 #include <sstream>
 
@@ -81,9 +82,9 @@ LinksDialog::LinksDialog(RsPeers *peers, RsFiles *files, QWidget *parent)
 
     /* Set header resize modes and initial section sizes */
 	QHeaderView * _header = ui.linkTreeWidget->header () ;
-  _header->setResizeMode (0, QHeaderView::Interactive);
-	_header->setResizeMode (1, QHeaderView::Interactive);
-	_header->setResizeMode (2, QHeaderView::Interactive);
+	QHeaderView_setSectionResizeMode(_header, 0, QHeaderView::Interactive);
+	QHeaderView_setSectionResizeMode(_header, 1, QHeaderView::Interactive);
+	QHeaderView_setSectionResizeMode(_header, 2, QHeaderView::Interactive);
 
 	_header->resizeSection ( 0, 400 );
 	_header->resizeSection ( 1, 60 );
diff --git a/plugins/VOIP/VOIP.pro b/plugins/VOIP/VOIP.pro
index e75bb72ef..e3f688eac 100644
--- a/plugins/VOIP/VOIP.pro
+++ b/plugins/VOIP/VOIP.pro
@@ -1,5 +1,10 @@
 !include("../Common/retroshare_plugin.pri"): error("Could not include file ../Common/retroshare_plugin.pri")
 
+greaterThan(QT_MAJOR_VERSION, 4) {
+	# Qt 5
+	QT += widgets
+}
+
 exists($$[QMAKE_MKSPECS]/features/mobility.prf) {
   CONFIG += mobility
 } else {
diff --git a/plugins/VOIP/VOIPPlugin.cpp b/plugins/VOIP/VOIPPlugin.cpp
index 78236b377..b4c3cb21c 100644
--- a/plugins/VOIP/VOIPPlugin.cpp
+++ b/plugins/VOIP/VOIPPlugin.cpp
@@ -5,6 +5,7 @@
 #include <QApplication>
 #include <QString>
 #include <QIcon>
+#include <QMessageBox>
 
 #include "VOIPPlugin.h"
 #include "interface/rsvoip.h"
diff --git a/plugins/VOIP/gui/AudioInputConfig.cpp b/plugins/VOIP/gui/AudioInputConfig.cpp
index 23cd43bec..564c305c9 100644
--- a/plugins/VOIP/gui/AudioInputConfig.cpp
+++ b/plugins/VOIP/gui/AudioInputConfig.cpp
@@ -29,6 +29,8 @@
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+#include <QTimer>
+
 //#include "AudioInput.h"
 //#include "AudioOutput.h"
 #include "AudioStats.h"
diff --git a/plugins/VOIP/gui/AudioStats.cpp b/plugins/VOIP/gui/AudioStats.cpp
index 354fa367c..93435127e 100644
--- a/plugins/VOIP/gui/AudioStats.cpp
+++ b/plugins/VOIP/gui/AudioStats.cpp
@@ -30,6 +30,8 @@
 
 #define iroundf(x) ( static_cast<int>(x) )
 
+#include <QPainter>
+
 #include "AudioStats.h"
 #include "AudioInputConfig.h"
 //#include "Global.h"
diff --git a/plugins/VOIP/gui/AudioStats.h b/plugins/VOIP/gui/AudioStats.h
index f1a887fc2..afa652831 100644
--- a/plugins/VOIP/gui/AudioStats.h
+++ b/plugins/VOIP/gui/AudioStats.h
@@ -31,8 +31,7 @@
 #ifndef _AUDIOSTATS_H
 #define _AUDIOSTATS_H
 
-#include <QtCore>
-#include <QtGui>
+#include <QWidget>
 
 //#include "mumble_pch.hpp"
 
diff --git a/plugins/VOIP/gui/AudioWizard.cpp b/plugins/VOIP/gui/AudioWizard.cpp
index 1b75d40da..32729cdf5 100644
--- a/plugins/VOIP/gui/AudioWizard.cpp
+++ b/plugins/VOIP/gui/AudioWizard.cpp
@@ -28,6 +28,8 @@
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+#include <QTimer>
+
 #include "AudioWizard.h"
 //#include "AudioInput.h"
 //#include "Global.h"
diff --git a/plugins/VOIP/gui/AudioWizard.h b/plugins/VOIP/gui/AudioWizard.h
index cee60f4f5..d43117ae3 100644
--- a/plugins/VOIP/gui/AudioWizard.h
+++ b/plugins/VOIP/gui/AudioWizard.h
@@ -40,6 +40,9 @@
 
 #include "ui_AudioWizard.h"
 
+class QGraphicsScene;
+class QGraphicsItem;
+
 class AudioWizard: public QWizard, public Ui::AudioWizard {
 	private:
 		Q_OBJECT
diff --git a/plugins/VOIP/gui/audiodevicehelper.cpp b/plugins/VOIP/gui/audiodevicehelper.cpp
index 5ba8628cd..a54dffa5f 100644
--- a/plugins/VOIP/gui/audiodevicehelper.cpp
+++ b/plugins/VOIP/gui/audiodevicehelper.cpp
@@ -8,8 +8,13 @@ AudioDeviceHelper::AudioDeviceHelper()
 QAudioInput* AudioDeviceHelper::getDefaultInputDevice() 
 {
     QAudioFormat fmt;
+#if QT_VERSION >= QT_VERSION_CHECK (5, 0, 0)
+    fmt.setSampleRate(16000);
+    fmt.setChannelCount(1);
+#else
     fmt.setFrequency(16000);
     fmt.setChannels(1);
+#endif
     fmt.setSampleSize(16);
     fmt.setSampleType(QAudioFormat::SignedInt);
     fmt.setByteOrder(QAudioFormat::LittleEndian);
@@ -45,8 +50,13 @@ QAudioInput* AudioDeviceHelper::getPreferedInputDevice() {
 
 QAudioOutput* AudioDeviceHelper::getDefaultOutputDevice() {
     QAudioFormat fmt;
+#if QT_VERSION >= QT_VERSION_CHECK (5, 0, 0)
+    fmt.setSampleRate(16000);
+    fmt.setChannelCount(1);
+#else
     fmt.setFrequency(16000);
     fmt.setChannels(1);
+#endif
     fmt.setSampleSize(16);
     fmt.setSampleType(QAudioFormat::SignedInt);
     fmt.setByteOrder(QAudioFormat::LittleEndian);