diff --git a/src/Mod/Inspection/App/CMakeLists.txt b/src/Mod/Inspection/App/CMakeLists.txt
index 78cbb20f5f..9790087a51 100644
--- a/src/Mod/Inspection/App/CMakeLists.txt
+++ b/src/Mod/Inspection/App/CMakeLists.txt
@@ -36,10 +36,15 @@ set(Inspection_Scripts
     ../Init.py
 )
 
+if(FREECAD_USE_PCH)
+    add_definitions(-D_PreComp_)
+    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" PCH_SRCS ${Inspection_SRCS})
+    ADD_MSVC_PRECOMPILED_HEADER(Inspection PreCompiled.h PreCompiled.cpp PCH_SRCS)
+endif(FREECAD_USE_PCH)
+
 add_library(Inspection SHARED ${Inspection_SRCS} ${Inspection_Scripts})
 target_link_libraries(Inspection ${Inspection_LIBS})
 
-
 fc_target_copy_resource_flat(Inspection
     ${CMAKE_CURRENT_SOURCE_DIR}
     ${CMAKE_BINARY_DIR}/Mod/Inspection
diff --git a/src/Mod/Inspection/App/PreCompiled.cpp b/src/Mod/Inspection/App/PreCompiled.cpp
index c74d61cf64..41bf7beded 100644
--- a/src/Mod/Inspection/App/PreCompiled.cpp
+++ b/src/Mod/Inspection/App/PreCompiled.cpp
@@ -20,5 +20,4 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h" 
diff --git a/src/Mod/Inspection/App/PreCompiled.h b/src/Mod/Inspection/App/PreCompiled.h
index 2e8550c6e6..7b2059b4e3 100644
--- a/src/Mod/Inspection/App/PreCompiled.h
+++ b/src/Mod/Inspection/App/PreCompiled.h
@@ -19,51 +19,38 @@
  *   Suite 330, Boston, MA  02111-1307, USA                                *
  *                                                                         *
  ***************************************************************************/
-
-
+ 
 #ifndef APP_PRECOMPILED_H
 #define APP_PRECOMPILED_H
 
 #include <FCConfig.h>
 
 #ifdef _MSC_VER
-# pragma warning(disable : 4290)
-# pragma warning(disable : 4275)
+# pragma warning(disable : 4005)
+# pragma warning(disable : 4251)
+# pragma warning(disable : 4503)
+# pragma warning(disable : 4786)// specifier longer then 255 chars
 #endif
 
 #ifdef _PreComp_
 
-// standard
-#include <cstdio>
-#include <cassert>
-#include <iostream>
+// STL
 #include <numeric>
 
-// STL
-#include <algorithm>
-#include <iostream>
-#include <list>
-#include <map>
-#include <queue>
-#include <set>
-#include <sstream>
-#include <stack>
-#include <string>
-#include <vector>
-
 // OCC
-#include <gp_Pnt.hxx>
 #include <BRepExtrema_DistShapeShape.hxx>
 #include <BRepBuilderAPI_MakeVertex.hxx>
 #include <BRepClass3d_SolidClassifier.hxx>
 #include <BRepGProp_Face.hxx>
+#include <gp_Pnt.hxx>
+#include <TopExp.hxx>
 #include <TopoDS.hxx>
 
 // Qt
-#include <QtConcurrentMap>
 #include <QEventLoop>
 #include <QFuture>
 #include <QFutureWatcher>
+#include <QtConcurrentMap>
 
 #endif //_PreComp_
 
diff --git a/src/Mod/Inspection/Gui/CMakeLists.txt b/src/Mod/Inspection/Gui/CMakeLists.txt
index ba50d91854..b8270eab39 100644
--- a/src/Mod/Inspection/Gui/CMakeLists.txt
+++ b/src/Mod/Inspection/Gui/CMakeLists.txt
@@ -45,6 +45,12 @@ set(InspectionGui_Scripts
     ../InitGui.py
 )
 
+if(FREECAD_USE_PCH)
+    add_definitions(-D_PreComp_)
+    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" PCH_SRCS ${InspectionGui_SRCS})
+    ADD_MSVC_PRECOMPILED_HEADER(InspectionGui PreCompiled.h PreCompiled.cpp PCH_SRCS)
+endif(FREECAD_USE_PCH)
+
 SET(InspectionGuiIcon_SVG
     Resources/icons/InspectionWorkbench.svg
 )
diff --git a/src/Mod/Inspection/Gui/Command.cpp b/src/Mod/Inspection/Gui/Command.cpp
index 609b294a92..4767190cf5 100644
--- a/src/Mod/Inspection/Gui/Command.cpp
+++ b/src/Mod/Inspection/Gui/Command.cpp
@@ -21,7 +21,6 @@
  ***************************************************************************/
 
 #include "PreCompiled.h"
-
 #ifndef _PreComp_
 # include <Inventor/events/SoButtonEvent.h>
 #endif
diff --git a/src/Mod/Inspection/Gui/PreCompiled.cpp b/src/Mod/Inspection/Gui/PreCompiled.cpp
index c74d61cf64..41bf7beded 100644
--- a/src/Mod/Inspection/Gui/PreCompiled.cpp
+++ b/src/Mod/Inspection/Gui/PreCompiled.cpp
@@ -20,5 +20,4 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h" 
diff --git a/src/Mod/Inspection/Gui/PreCompiled.h b/src/Mod/Inspection/Gui/PreCompiled.h
index f80b346f42..6751f3a7c2 100644
--- a/src/Mod/Inspection/Gui/PreCompiled.h
+++ b/src/Mod/Inspection/Gui/PreCompiled.h
@@ -20,67 +20,46 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #ifndef GUI_PRECOMPILED_H
 #define GUI_PRECOMPILED_H
 
 #include <FCConfig.h>
 
-#ifdef FC_OS_WIN32
-# ifndef NOMINMAX
-# define NOMINMAX
-# endif
-#endif
-
 #ifdef _MSC_VER
-#   pragma warning(disable : 4005)
+# pragma warning(disable : 4005)
+# pragma warning(disable : 4251)
+# pragma warning(disable : 4503)
+# pragma warning(disable : 4786)// specifier longer then 255 chars
 #endif
 
 #ifdef _PreComp_
 
-// standard
-#include <cstdio>
-#include <cassert>
-
 // STL
-#include <algorithm>
-#include <iostream>
-#include <list>
-#include <map>
-#include <queue>
-#include <set>
-#include <sstream>
-#include <stack>
-#include <string>
-#include <vector>
-
-#ifdef FC_OS_WIN32
-# include <windows.h>
-#endif
+#include <cfloat>
 
 // Inventor
 #include <Inventor/SoPickedPoint.h>
 #include <Inventor/actions/SoRayPickAction.h>
 #include <Inventor/actions/SoSearchAction.h>
 #include <Inventor/details/SoFaceDetail.h>
+#include <Inventor/errors/SoDebugError.h>
 #include <Inventor/events/SoButtonEvent.h>
 #include <Inventor/events/SoKeyboardEvent.h>
 #include <Inventor/events/SoMouseButtonEvent.h>
-#include <Inventor/lists/SoPickedPointList.h> 
 #include <Inventor/nodes/SoCoordinate3.h>
 #include <Inventor/nodes/SoDrawStyle.h>
 #include <Inventor/nodes/SoIndexedFaceSet.h>
+#include <Inventor/nodes/SoIndexedLineSet.h>
 #include <Inventor/nodes/SoMaterial.h>
 #include <Inventor/nodes/SoMaterialBinding.h>
 #include <Inventor/nodes/SoNormal.h>
 #include <Inventor/nodes/SoPointSet.h>
 #include <Inventor/nodes/SoShapeHints.h>
-#include <Inventor/errors/SoDebugError.h>
 
-// Qt Toolkit
-#ifndef __QtAll__
-# include <Gui/QtAll.h>
-#endif
+// Qt
+#include <QApplication>
+#include <QMenu>
+#include <QMessageBox>
 
 #endif  //_PreComp_