diff --git a/CMakeLists.txt b/CMakeLists.txt
index 52e5856e1270..759a4abc98b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -150,6 +150,8 @@ OPTION(FREECAD_USE_FREETYPE "Builds the features using FreeType libs" ON)
 OPTION(FREECAD_BUILD_FEM_NETGEN "Build the FreeCAD FEM module with the NETGEN mesher" OFF)
 endif(MSVC)
 
+OPTION(FREECAD_USE_QT5 "Use Qt5 instead of Qt4" OFF)
+
 # if this is set override some options
 if (FREECAD_BUILD_DEBIAN)
     set(FREECAD_USE_EXTERNAL_ZIPIOS ON)
@@ -378,49 +380,86 @@ else(FREECAD_LIBPACK_USE)
 # -------------------------------- Qt --------------------------------
 
 # sets ${QT_LIBRARIES}
-
-    SET(QT_MIN_VERSION 4.5.0)
-    set(QT_USE_QTNETWORK TRUE)
-    set(QT_USE_QTXML TRUE)
-    if(FREECAD_BUILD_GUI)
-        set(QT_USE_QTOPENGL TRUE)
-        set(QT_USE_QTSVG TRUE)
-        set(QT_USE_QTUITOOLS TRUE)
-        set(QT_USE_QTWEBKIT TRUE)
-    endif(FREECAD_BUILD_GUI)
-    find_package(Qt4 REQUIRED)
-
-    include(${QT_USE_FILE})
-
-    IF(NOT QT4_FOUND)
-        MESSAGE("Library qt-4.3 or above is not available, install QT or FreeCAD Gui version will not be built")
-    ENDIF(NOT QT4_FOUND)
-
-    IF(NOT QT_QTWEBKIT_FOUND)
-        MESSAGE("Qt Webkit not found, will not build browser integration!")
-    ENDIF(NOT QT_QTWEBKIT_FOUND)
-
-
-    # This is a special version of the built in macro qt4_wrap_cpp
-    # It is required since moc'ed files are now included instead of being added to projects directly
-    # It adds a reverse dependency to solve this
-    # This has the unfortunate side effect that some files are always rebuilt
-    # There is probably a cleaner solution than this
-    macro(fc_wrap_cpp outfiles )
-        # get include dirs
-        QT4_GET_MOC_FLAGS(moc_flags)
-        QT4_EXTRACT_OPTIONS(moc_files moc_options moc_target ${ARGN})
-        # fixes bug 0000585: bug with boost 1.48
-        SET(moc_options ${moc_options} -DBOOST_TT_HAS_OPERATOR_HPP_INCLUDED)
-
-        foreach(it ${moc_files})
-            get_filename_component(it ${it} ABSOLUTE)
-            QT4_MAKE_OUTPUT_FILE(${it} moc_ cpp outfile)
-            QT4_CREATE_MOC_COMMAND(${it} ${outfile} "${moc_flags}" "${moc_options}" "${moc_target}")
-            set(${outfiles} ${${outfiles}} ${outfile})
-            add_file_dependencies(${it} ${outfile})
-        endforeach(it)
-    endmacro(fc_wrap_cpp)
+    if(FREECAD_USE_QT5)
+        if(CMAKE_VERSION VERSION_LESS 2.8.11)
+            message(FATAL_ERROR "Qt 5 requires at least CMake version 2.8.11")
+        endif(CMAKE_VERSION VERSION_LESS 2.8.11)
+
+        #set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+        set(Qt5_components Network Xml Http)
+        if(FREECAD_BUILD_GUI)
+            set(Qt5_components ${Qt5_components} Widgets OpenGL Svg UiTools WebKitWidgets PrintSupport Concurrent)
+        endif(FREECAD_BUILD_GUI) 
+        
+        find_package(Qt5 REQUIRED COMPONENTS ${Qt5_components})
+
+        set(QT_INCLUDE_DIR ${Qt5Widgets_INCLUDE_DIRS})
+        foreach(component ${Qt5_components})
+            set(QT_LIBRARIES ${QT_LIBRARIES} Qt5::${component})
+        endforeach(component)
+
+        macro(fc_qt5_wrap_cpp outfiles )
+           # get include dirs
+           QT5_GET_MOC_FLAGS(moc_flags)
+           set(moc_files ${ARGN})
+           #QT4_EXTRACT_OPTIONS(moc_files moc_options moc_target ${ARGN})
+           # fixes bug 0000585: bug with boost 1.48
+           SET(moc_options ${moc_options} -DBOOST_TT_HAS_OPERATOR_HPP_INCLUDED)
+
+            foreach(it ${moc_files})
+                get_filename_component(it ${it} ABSOLUTE)
+                QT5_MAKE_OUTPUT_FILE(${it} moc_ cpp outfile)
+                QT5_CREATE_MOC_COMMAND(${it} ${outfile} "${moc_flags}" "${moc_options}" "${moc_target}")
+               set(${outfiles} ${${outfiles}} ${outfile})
+               add_file_dependencies(${it} ${outfile})
+            endforeach(it)
+        endmacro(fc_qt5_wrap_cpp)
+
+    else(FREECAD_USE_QT5)
+        SET(QT_MIN_VERSION 4.5.0)
+        set(QT_USE_QTNETWORK TRUE)
+        set(QT_USE_QTXML TRUE)
+        if(FREECAD_BUILD_GUI)
+            set(QT_USE_QTOPENGL TRUE)
+            set(QT_USE_QTSVG TRUE)
+            set(QT_USE_QTUITOOLS TRUE)
+            set(QT_USE_QTWEBKIT TRUE)
+        endif(FREECAD_BUILD_GUI)
+        find_package(Qt4 REQUIRED)
+
+        include(${QT_USE_FILE})
+
+        IF(NOT QT4_FOUND)
+            MESSAGE("Library qt-4.3 or above is not available, install QT or FreeCAD Gui version will not be built")
+        ENDIF(NOT QT4_FOUND)
+
+        IF(NOT QT_QTWEBKIT_FOUND)
+            MESSAGE("Qt Webkit not found, will not build browser integration!")
+        ENDIF(NOT QT_QTWEBKIT_FOUND)
+
+
+        # This is a special version of the built in macro qt4_wrap_cpp
+        # It is required since moc'ed files are now included instead of being added to projects directly
+        # It adds a reverse dependency to solve this
+        # This has the unfortunate side effect that some files are always rebuilt
+        # There is probably a cleaner solution than this
+        macro(fc_wrap_cpp outfiles )
+           # get include dirs
+           QT4_GET_MOC_FLAGS(moc_flags)
+           QT4_EXTRACT_OPTIONS(moc_files moc_options moc_target ${ARGN})
+           # fixes bug 0000585: bug with boost 1.48
+           SET(moc_options ${moc_options} -DBOOST_TT_HAS_OPERATOR_HPP_INCLUDED)
+
+            foreach(it ${moc_files})
+                get_filename_component(it ${it} ABSOLUTE)
+                QT4_MAKE_OUTPUT_FILE(${it} moc_ cpp outfile)
+                QT4_CREATE_MOC_COMMAND(${it} ${outfile} "${moc_flags}" "${moc_options}" "${moc_target}")
+               set(${outfiles} ${${outfiles}} ${outfile})
+               add_file_dependencies(${it} ${outfile})
+            endforeach(it)
+        endmacro(fc_wrap_cpp)
+    endif(FREECAD_USE_QT5)
 
 #--------------------FreeType-----------------------
 
diff --git a/src/3rdParty/Pivy-0.5/CMakeLists.txt b/src/3rdParty/Pivy-0.5/CMakeLists.txt
index fc810fb790d5..f4d8f6e47342 100644
--- a/src/3rdParty/Pivy-0.5/CMakeLists.txt
+++ b/src/3rdParty/Pivy-0.5/CMakeLists.txt
@@ -89,7 +89,7 @@ if(MSVC)
         optimized ${PYTHON_LIBRARY})
 else(MSVC)
     set(SoQtPy_LIBS
-        ${SOQT_LIBRARIES}
+        ${SOQT_LIBRARY}
         ${COIN3D_LIBRARY}
         ${PYTHON_LIBRARY})
 endif(MSVC)
diff --git a/src/Base/CMakeLists.txt b/src/Base/CMakeLists.txt
index 31111e3b0b30..031e189a9ee6 100644
--- a/src/Base/CMakeLists.txt
+++ b/src/Base/CMakeLists.txt
@@ -17,6 +17,10 @@ include_directories(
     ${PYCXX_INCLUDE_DIR}
 )
 
+if(FREECAD_USE_QT5)
+    set(QT_QTCORE_LIBRARY Qt5::Core)
+endif(FREECAD_USE_QT5)
+
 if(MSVC)
     set(FreeCADBase_LIBS
         ${Boost_LIBRARIES}
@@ -147,7 +151,12 @@ set(FreeCADBase_MOC_HDRS
     Debugger.h
     FutureWatcherProgress.h
 )
-fc_wrap_cpp(FreeCADBase_MOC_SRCS ${FreeCADBase_MOC_HDRS})
+
+if(FREECAD_USE_QT5)
+    fc_qt5_wrap_cpp(FreeCADBase_MOC_SRCS ${FreeCADBase_MOC_HDRS})
+else(FREECAD_USE_QT5)
+    fc_wrap_cpp(FreeCADBase_MOC_SRCS ${FreeCADBase_MOC_HDRS})
+endif(FREECAD_USE_QT5)
 
 SET(FreeCADBase_UNITAPI_SRCS
     UnitsApi.cpp
diff --git a/src/Gui/CMakeLists.txt b/src/Gui/CMakeLists.txt
index db271fc9cb33..c5302ccac24c 100644
--- a/src/Gui/CMakeLists.txt
+++ b/src/Gui/CMakeLists.txt
@@ -210,8 +210,14 @@ set(Gui_MOC_HDRS
     TaskView/TaskEditControl.h
     TaskView/TaskView.h
 )
-#qt4_wrap_cpp(Gui_MOC_SRCS ${Gui_MOC_HDRS})
-fc_wrap_cpp(Gui_MOC_SRCS ${Gui_MOC_HDRS})
+
+if(FREECAD_USE_QT5)
+    fc_qt5_wrap_cpp(Gui_MOC_SRCS ${Gui_MOC_HDRS})
+else(FREECAD_USE_QT5)
+    #qt4_wrap_cpp(Gui_MOC_SRCS ${Gui_MOC_HDRS})
+    fc_wrap_cpp(Gui_MOC_SRCS ${Gui_MOC_HDRS})
+endif(FREECAD_USE_QT5)
+
 #SOURCE_GROUP("Moc" FILES ${Gui_MOC_SRCS})
 
 SET(Gui_UIC_SRCS
@@ -268,9 +274,15 @@ SET(Gui_RES_SRCS
     Language/translation.qrc
     iisTaskPanel/src/iisTaskPanel.qrc
 )
-QT4_ADD_RESOURCES(Gui_QRC_SRCS ${Gui_RES_SRCS})
 
-QT4_WRAP_UI(Gui_UIC_HDRS ${Gui_UIC_SRCS})
+if(FREECAD_USE_QT5)
+    qt5_add_resources(Gui_QRC_SRCS ${Gui_RES_SRCS})
+    qt5_wrap_ui(Gui_UIC_HDRS ${Gui_UIC_SRCS})
+else(FREECAD_USE_QT5)
+    QT4_ADD_RESOURCES(Gui_QRC_SRCS ${Gui_RES_SRCS})
+    QT4_WRAP_UI(Gui_UIC_HDRS ${Gui_UIC_SRCS})
+endif(FREECAD_USE_QT5)
+
 SOURCE_GROUP("Uic" FILES ${Gui_UIC_HDRS})
 
 # The command sources
@@ -606,9 +618,14 @@ set(iis_MOC_HDRS
     iisTaskPanel/src/iistaskgroup.h
     iisTaskPanel/src/iistaskheader.h
 )
-qt4_wrap_cpp(iis_MOC_SRCS ${iis_MOC_HDRS})
-SOURCE_GROUP("Widget\\iisTaskPanel\\Mocs" FILES ${iis_MOC_SRCS})
 
+if(FREECAD_USE_QT5)
+    fc_qt5_wrap_cpp(iis_MOC_SRCS ${iis_MOC_HDRS})
+else(FREECAD_USE_QT5)
+    qt4_wrap_cpp(iis_MOC_SRCS ${iis_MOC_HDRS})
+endif(FREECAD_USE_QT5)
+
+SOURCE_GROUP("Widget\\iisTaskPanel\\Mocs" FILES ${iis_MOC_SRCS})
 
 #SET(Resource_RCS
 #   Icons/resource.qrc