diff --git a/CGALimageIO/src/CGALImageIO/CMakeLists.txt b/CGALimageIO/src/CGALImageIO/CMakeLists.txt
index c5aa26e526b..48c8e5a7bee 100644
--- a/CGALimageIO/src/CGALImageIO/CMakeLists.txt
+++ b/CGALimageIO/src/CGALImageIO/CMakeLists.txt
@@ -48,7 +48,7 @@ if(OPENGL_FOUND)
 
   use_essential_libs()
 
-  include_directories( ${CGAL_3RD_PARTY_INCLUDE_DIRS} ${CGAL_ImageIO_3RD_PARTY_INCLUDE_DIRS} )
+  include_directories( SYSTEM ${CGAL_3RD_PARTY_INCLUDE_DIRS} ${CGAL_ImageIO_3RD_PARTY_INCLUDE_DIRS} )
   
   link_directories    ( ${CGAL_LIBRARIES_DIR} ${CGAL_3RD_PARTY_LIBRARIES_DIRS} )
 
diff --git a/Core/src/CGALCore/CMakeLists.txt b/Core/src/CGALCore/CMakeLists.txt
index 1494ae5b374..8e5e50f8553 100644
--- a/Core/src/CGALCore/CMakeLists.txt
+++ b/Core/src/CGALCore/CMakeLists.txt
@@ -2,7 +2,7 @@ message("Configuring libCGAL_Core")
  
 use_essential_libs()
 
-include_directories (${CGAL_3RD_PARTY_INCLUDE_DIRS})
+include_directories (SYSTEM ${CGAL_3RD_PARTY_INCLUDE_DIRS})
 
 add_definitions(${CGAL_3RD_PARTY_DEFINITIONS})
 
diff --git a/GraphicsView/src/CGALQt4/CMakeLists.txt b/GraphicsView/src/CGALQt4/CMakeLists.txt
index eb26cc59492..d956c43d59b 100644
--- a/GraphicsView/src/CGALQt4/CMakeLists.txt
+++ b/GraphicsView/src/CGALQt4/CMakeLists.txt
@@ -59,7 +59,7 @@ if( QT4_FOUND )
 
     use_essential_libs()
 
-    include_directories( ${CGAL_3RD_PARTY_INCLUDE_DIRS} ${CGAL_Qt4_3RD_PARTY_INCLUDE_DIRS} )
+    include_directories( SYSTEM ${CGAL_3RD_PARTY_INCLUDE_DIRS} ${CGAL_Qt4_3RD_PARTY_INCLUDE_DIRS} )
 
     link_directories    ( ${CGAL_LIBRARIES_DIR} ${CGAL_3RD_PARTY_LIBRARIES_DIRS} )
 
diff --git a/Installation/cmake/modules/CGAL_UseBLAS.cmake b/Installation/cmake/modules/CGAL_UseBLAS.cmake
index 37de5468bc5..941b795ba78 100644
--- a/Installation/cmake/modules/CGAL_UseBLAS.cmake
+++ b/Installation/cmake/modules/CGAL_UseBLAS.cmake
@@ -5,7 +5,7 @@ if ( BLAS_FOUND AND NOT BLAS_SETUP )
 
   message( STATUS "UseBLAS" )
   message( STATUS "BLAS include:     ${BLAS_INCLUDE_DIR}" )
-  include_directories ( ${BLAS_INCLUDE_DIR} )
+  include_directories ( SYSTEM ${BLAS_INCLUDE_DIR} )
 
   message( STATUS "BLAS definitions: ${BLAS_DEFINITIONS}" )
   add_definitions( ${BLAS_DEFINITIONS} )
diff --git a/Installation/cmake/modules/CGAL_UseLAPACK.cmake b/Installation/cmake/modules/CGAL_UseLAPACK.cmake
index b88f53e151f..89790863a72 100644
--- a/Installation/cmake/modules/CGAL_UseLAPACK.cmake
+++ b/Installation/cmake/modules/CGAL_UseLAPACK.cmake
@@ -5,7 +5,7 @@ if ( LAPACK_FOUND AND NOT LAPACK_SETUP )
 
   message( STATUS "UseLAPACK" )
   message( STATUS "LAPACK include:     ${LAPACK_INCLUDE_DIR}" )
-  include_directories ( ${LAPACK_INCLUDE_DIR} )
+  include_directories ( SYSTEM ${LAPACK_INCLUDE_DIR} )
 
   message( STATUS "LAPACK definitions: ${LAPACK_DEFINITIONS}" )
   add_definitions( ${LAPACK_DEFINITIONS} )
diff --git a/Installation/cmake/modules/CGAL_UseLEDA.cmake b/Installation/cmake/modules/CGAL_UseLEDA.cmake
index d16bfb12565..a66a58badca 100644
--- a/Installation/cmake/modules/CGAL_UseLEDA.cmake
+++ b/Installation/cmake/modules/CGAL_UseLEDA.cmake
@@ -5,7 +5,7 @@ if ( LEDA_FOUND AND NOT LEDA_SETUP )
 
   message( STATUS "UseLEDA" )
   message( STATUS "LEDA include:     ${LEDA_INCLUDE_DIR}" )
-  include_directories ( ${LEDA_INCLUDE_DIR} )
+  include_directories ( SYSTEM ${LEDA_INCLUDE_DIR} )
 
   message( STATUS "LEDA definitions: ${LEDA_DEFINITIONS}" )
   add_definitions( ${LEDA_DEFINITIONS} )
diff --git a/Installation/cmake/modules/CGAL_UseMKL.cmake b/Installation/cmake/modules/CGAL_UseMKL.cmake
index 9ae7f2e6207..50fd0328adf 100644
--- a/Installation/cmake/modules/CGAL_UseMKL.cmake
+++ b/Installation/cmake/modules/CGAL_UseMKL.cmake
@@ -4,7 +4,7 @@
 if ( MKL_FOUND AND NOT CGAL_MKL_SETUP )
 
   message( STATUS "MKL include:     ${MKL_INCLUDE_DIR}" )
-  include_directories ( ${MKL_INCLUDE_DIR} )
+  include_directories ( SYSTEM ${MKL_INCLUDE_DIR} )
 
   message( STATUS "MKL definitions: ${MKL_DEFINITIONS}" )
   add_definitions( ${MKL_DEFINITIONS} )
diff --git a/Installation/cmake/modules/CGAL_UseMPFI.cmake b/Installation/cmake/modules/CGAL_UseMPFI.cmake
index 17692545ea5..11198b5d784 100644
--- a/Installation/cmake/modules/CGAL_UseMPFI.cmake
+++ b/Installation/cmake/modules/CGAL_UseMPFI.cmake
@@ -25,7 +25,7 @@ if( MPFI_FOUND AND NOT MPFI_SETUP )
            )
 
     if( COMPILED_MPFI_TEST AND MPFI_TEST_RESULT EQUAL 0)
-      include_directories( ${MPFI_INCLUDE_DIR} )
+      include_directories( SYSTEM ${MPFI_INCLUDE_DIR} )
       link_directories( ${MPFI_LIBRARIES_DIR} )
       add_definitions( ${MPFI_DEFINITIONS} "-DCGAL_USE_MPFI" )
       link_libraries( ${MPFI_LIBRARIES} )
diff --git a/Installation/cmake/modules/CGAL_UseRS.cmake b/Installation/cmake/modules/CGAL_UseRS.cmake
index 80b92790093..a3e4dcc205c 100644
--- a/Installation/cmake/modules/CGAL_UseRS.cmake
+++ b/Installation/cmake/modules/CGAL_UseRS.cmake
@@ -21,7 +21,7 @@ if( RS_FOUND AND NOT RS_SETUP )
       endif( IS_OLD_GXX )
     endif( APPLE AND CMAKE_COMPILER_IS_GNUCXX )
 
-    include_directories ( ${RS_INCLUDE_DIR} )
+    include_directories ( SYSTEM ${RS_INCLUDE_DIR} )
     add_definitions( ${RS_DEFINITIONS} "-DCGAL_USE_RS" )
     link_libraries( ${RS_LIBRARIES} )
 
diff --git a/Installation/cmake/modules/CGAL_UseRS3.cmake b/Installation/cmake/modules/CGAL_UseRS3.cmake
index 27cd09c1267..db6e1001809 100644
--- a/Installation/cmake/modules/CGAL_UseRS3.cmake
+++ b/Installation/cmake/modules/CGAL_UseRS3.cmake
@@ -11,7 +11,7 @@ if( RS3_FOUND AND NOT RS3_SETUP )
     message( STATUS "RS3 definitions:   ${RS3_DEFINITIONS}" )
     message( STATUS "RS3 libraries:     ${RS3_LIBRARIES}" )
 
-    include_directories ( ${RS3_INCLUDE_DIR} )
+    include_directories ( SYSTEM ${RS3_INCLUDE_DIR} )
     add_definitions( ${RS3_DEFINITIONS} "-DCGAL_USE_RS3" )
     link_libraries( ${RS3_LIBRARIES} )
 
diff --git a/Installation/cmake/modules/CGAL_UseTAUCS.cmake b/Installation/cmake/modules/CGAL_UseTAUCS.cmake
index 3a3035ca411..b980dee1d31 100644
--- a/Installation/cmake/modules/CGAL_UseTAUCS.cmake
+++ b/Installation/cmake/modules/CGAL_UseTAUCS.cmake
@@ -5,7 +5,7 @@ if ( TAUCS_FOUND AND NOT TAUCS_SETUP )
 
   message( STATUS "UseTAUCS" )
   message( STATUS "TAUCS include:     ${TAUCS_INCLUDE_DIR}" )
-  include_directories ( ${TAUCS_INCLUDE_DIR} )
+  include_directories ( SYSTEM ${TAUCS_INCLUDE_DIR} )
 
   message( STATUS "TAUCS definitions: ${TAUCS_DEFINITIONS}" )
   add_definitions( ${TAUCS_DEFINITIONS} "-DCGAL_USE_TAUCS" )
diff --git a/Installation/cmake/modules/UseCGAL.cmake b/Installation/cmake/modules/UseCGAL.cmake
index 1a18a69bf33..00b2de8710a 100644
--- a/Installation/cmake/modules/UseCGAL.cmake
+++ b/Installation/cmake/modules/UseCGAL.cmake
@@ -38,7 +38,8 @@ if(NOT USE_CGAL_FILE_INCLUDED)
   #message (STATUS "LIB: ${CGAL_LIBRARY}")
   #message (STATUS "LIBS: ${CGAL_LIBRARIES}")
   
-  include_directories ( ${CGAL_INCLUDE_DIRS} ${CGAL_3RD_PARTY_INCLUDE_DIRS} )     
+  include_directories ( ${CGAL_INCLUDE_DIRS})
+  include_directories ( SYSTEM ${CGAL_3RD_PARTY_INCLUDE_DIRS} )
   add_definitions     ( ${CGAL_3RD_PARTY_DEFINITIONS}  ${CGAL_DEFINITIONS}  )
   
   link_directories    ( ${CGAL_LIBRARIES_DIR} ${CGAL_3RD_PARTY_LIBRARIES_DIRS} )
diff --git a/Installation/cmake/modules/UseESBTL.cmake b/Installation/cmake/modules/UseESBTL.cmake
index d72567a5da9..5c820753402 100644
--- a/Installation/cmake/modules/UseESBTL.cmake
+++ b/Installation/cmake/modules/UseESBTL.cmake
@@ -1,4 +1,4 @@
 # This module setups the compiler for using ESBTL library.
 # It assumes that find_package(ESBTL) was already called.
 
-include_directories( ${ESBTL_INCLUDE_DIR} )
+include_directories( SYSTEM ${ESBTL_INCLUDE_DIR} )
diff --git a/Installation/cmake/modules/UseEigen3.cmake b/Installation/cmake/modules/UseEigen3.cmake
index 88892219b3d..e3ed18be243 100644
--- a/Installation/cmake/modules/UseEigen3.cmake
+++ b/Installation/cmake/modules/UseEigen3.cmake
@@ -2,7 +2,7 @@
 # It assumes that find_package(Eigen3) was already called.
 
 
-include_directories( ${EIGEN3_INCLUDE_DIR} )
+include_directories( SYSTEM ${EIGEN3_INCLUDE_DIR} )
 
 add_definitions(-DCGAL_EIGEN3_ENABLED)
 
diff --git a/Installation/src/CGAL/CMakeLists.txt b/Installation/src/CGAL/CMakeLists.txt
index 8bef65a6f11..fc153457c3c 100644
--- a/Installation/src/CGAL/CMakeLists.txt
+++ b/Installation/src/CGAL/CMakeLists.txt
@@ -2,7 +2,7 @@ message("Configuring libCGAL")
 
 use_essential_libs()
 
-include_directories (${CGAL_3RD_PARTY_INCLUDE_DIRS})
+include_directories (SYSTEM ${CGAL_3RD_PARTY_INCLUDE_DIRS})
 
 add_definitions(${CGAL_3RD_PARTY_DEFINITIONS})
 
diff --git a/Qt_widget/src/CGALQt3/CMakeLists.txt b/Qt_widget/src/CGALQt3/CMakeLists.txt
index 7d9f3f45627..0ced524340b 100644
--- a/Qt_widget/src/CGALQt3/CMakeLists.txt
+++ b/Qt_widget/src/CGALQt3/CMakeLists.txt
@@ -39,7 +39,7 @@ if( QT3_FOUND )
 
     use_essential_libs()
        
-    include_directories( ${CGAL_3RD_PARTY_INCLUDE_DIRS} ${CGAL_Qt3_3RD_PARTY_INCLUDE_DIRS} )
+    include_directories( SYSTEM ${CGAL_3RD_PARTY_INCLUDE_DIRS} ${CGAL_Qt3_3RD_PARTY_INCLUDE_DIRS} )
 
     link_directories   ( ${CGAL_LIBRARIES_DIR} ${CGAL_3RD_PARTY_LIBRARIES_DIRS} )