diff --git a/CMakeExternals/ITK-4.9.0.patch b/CMakeExternals/ITK-4.9.0.patch
index d210df02f0..7356b58ef7 100644
--- a/CMakeExternals/ITK-4.9.0.patch
+++ b/CMakeExternals/ITK-4.9.0.patch
@@ -1,21 +1,28 @@
 diff --git a/Modules/ThirdParty/GDCM/CMakeLists.txt b/Modules/ThirdParty/GDCM/CMakeLists.txt
 --- a/Modules/ThirdParty/GDCM/CMakeLists.txt
 +++ b/Modules/ThirdParty/GDCM/CMakeLists.txt
 @@ -4,7 +4,7 @@ if(ITK_USE_SYSTEM_GDCM)
  if(ITK_USE_SYSTEM_GDCM)
    set(ITKGDCM_SYSTEM_INCLUDE_DIRS ${GDCM_INCLUDE_DIRS})
    set(ITKGDCM_SYSTEM_LIBRARY_DIRS ${GDCM_LIBRARY_DIRS})
 -  set(ITKGDCM_LIBRARIES gdcmDICT gdcmMSFF)
 +  set(ITKGDCM_LIBRARIES gdcmDICT gdcmMSFF gdcmDSED)
    set(ITKGDCM_NO_SRC 1)
 
    # When this module is loaded by an app, load GDCM too.
 @@ -42,7 +42,7 @@ else()
        endif()
      endif()
    endif()
 -  set(ITKGDCM_LIBRARIES  gdcmDICT gdcmMSFF )
 +  set(ITKGDCM_LIBRARIES  gdcmDICT gdcmMSFF gdcmDSED)
  endif()
 
  itk_module_impl()
+@@ -38,5 +38,6 @@ INSTALL(TARGETS ITKEXPAT
+ INSTALL(FILES
+   ${ITK3P_EXPAT_BINARY_DIR}/expatDllConfig.h
+   ${ITK3P_EXPAT_SOURCE_DIR}/expat.h
++  ${ITK3P_EXPAT_SOURCE_DIR}/ikt_expat_mangle.h
+   DESTINATION ${ITK3P_INSTALL_INCLUDE_DIR} # TODO: itk_expat.h #include "itkexpat/expat.h"
+   COMPONENT Development)