diff --git a/Modules/ThirdParty/DCMTK/CMakeLists.txt b/Modules/ThirdParty/DCMTK/CMakeLists.txt
index dd868017b52..5aaf18f2ebf 100644
--- a/Modules/ThirdParty/DCMTK/CMakeLists.txt
+++ b/Modules/ThirdParty/DCMTK/CMakeLists.txt
@@ -327,6 +327,7 @@ endforeach()
     -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}
     -DCMAKE_INSTALL_LIBDIR:PATH=${CMAKE_INSTALL_LIBDIR}
     -DCMAKE_INSTALL_BINDIR:PATH=${CMAKE_INSTALL_BINDIR}
+    -DDCMTK_ENABLE_BUILTIN_OFICONV_DATA:BOOL=${DCMTK_ENABLE_BUILTIN_OFICONV_DATA}
     ${CHARSET_CONVERSION_ARGS}
     DEPENDS ${JPEG_DEPENDENCY} ${PNG_DEPENDENCY} ${TIFF_DEPENDENCY} ${ICU_DEPENDENCY}
     BUILD_BYPRODUCTS ${DCMTK_BYPRODUCTS}
diff --git a/Modules/ThirdParty/DCMTK/itk-module-init.cmake b/Modules/ThirdParty/DCMTK/itk-module-init.cmake
index 941f06d98e7..fcfe495ba1e 100644
--- a/Modules/ThirdParty/DCMTK/itk-module-init.cmake
+++ b/Modules/ThirdParty/DCMTK/itk-module-init.cmake
@@ -26,6 +26,8 @@ if(ITK_USE_SYSTEM_DCMTK)
   list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_LIST_DIR}/CMake")
   find_package(DCMTK REQUIRED NO_MODULE)
 else(ITK_USE_SYSTEM_DCMTK)
+  # Change default from OFF to ON for portability.
+  option(DCMTK_ENABLE_BUILTIN_OFICONV_DATA "Embed oficonv data files into oficonv library" ON)
   # Copied and mofified from DCMTK/CMake/3rdparty.cmake
   if(NOT DEFINED DCMTK_USE_ICU)
     include(CheckCXXSourceCompiles)