diff --git a/Source/CMakeInstallDestinations.cmake b/Source/CMakeInstallDestinations.cmake
index 99c86ca77..2f9d95ae5 100644
--- a/Source/CMakeInstallDestinations.cmake
+++ b/Source/CMakeInstallDestinations.cmake
@@ -3,24 +3,29 @@ if(BEOS)
   set(CMAKE_DATA_DIR_DEFAULT "share/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # HAIKU
   set(CMAKE_MAN_DIR_DEFAULT "documentation/man") # HAIKU
   set(CMAKE_DOC_DIR_DEFAULT "documentation/doc/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # HAIKU
+  set(CMAKE_XDGDATA_DIR_DEFAULT "share") # HAIKU
 elseif(CYGWIN)
   set(CMAKE_DATA_DIR_DEFAULT "share/cmake-${CMake_VERSION}") # CYGWIN
   set(CMAKE_DOC_DIR_DEFAULT "share/doc/cmake-${CMake_VERSION}") # CYGWIN
   set(CMAKE_MAN_DIR_DEFAULT "share/man") # CYGWIN
+  set(CMAKE_XDGDATA_DIR_DEFAULT "share") # CYGWIN
 else()
   set(CMAKE_DATA_DIR_DEFAULT "share/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # OTHER
   set(CMAKE_DOC_DIR_DEFAULT "doc/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # OTHER
   set(CMAKE_MAN_DIR_DEFAULT "man") # OTHER
+  set(CMAKE_XDGDATA_DIR_DEFAULT "share") # OTHER
 endif()
 
 set(CMAKE_DATA_DIR_DESC "data")
 set(CMAKE_DOC_DIR_DESC "docs")
 set(CMAKE_MAN_DIR_DESC "man pages")
+set(CMAKE_XDGDATA_DIR_DESC "XDG specific files")
 
 foreach(v
     CMAKE_DATA_DIR
     CMAKE_DOC_DIR
     CMAKE_MAN_DIR
+    CMAKE_XDGDATA_DIR
     )
   # Populate the cache with empty values so we know when the user sets them.
   set(${v} "" CACHE STRING "")
diff --git a/Source/QtDialog/CMakeLists.txt b/Source/QtDialog/CMakeLists.txt
index 9161ad3ae..f17de5d50 100644
--- a/Source/QtDialog/CMakeLists.txt
+++ b/Source/QtDialog/CMakeLists.txt
@@ -193,7 +193,7 @@ if(UNIX AND NOT APPLE)
   foreach (size IN ITEMS 32 128)
     install(
       FILES       "${CMAKE_CURRENT_SOURCE_DIR}/CMakeSetup${size}.png"
-      DESTINATION "share/icons/hicolor/${size}x${size}/apps"
+      DESTINATION "${CMAKE_XDGDATA_DIR}/icons/hicolor/${size}x${size}/apps"
       ${COMPONENT}
       RENAME      "CMakeSetup.png")
   endforeach ()
@@ -201,10 +201,10 @@ if(UNIX AND NOT APPLE)
   # install a desktop file so CMake appears in the application start menu
   # with an icon
   install(FILES CMake.desktop
-    DESTINATION share/applications
+    DESTINATION "${CMAKE_XDGDATA_DIR}/applications"
     ${COMPONENT})
   install(FILES cmakecache.xml
-    DESTINATION share/mime/packages
+    DESTINATION "${CMAKE_XDGDATA_DIR}/mime/packages"
     ${COMPONENT})
 endif()
 
diff --git a/bootstrap b/bootstrap
index b2421a11b..97e85bfdf 100755
--- a/bootstrap
+++ b/bootstrap
@@ -63,9 +63,11 @@ cmake_copyright="`grep '^Copyright .* Kitware' "${cmake_source_dir}/Copyright.tx
 cmake_data_dir_keyword="OTHER"
 cmake_doc_dir_keyword="OTHER"
 cmake_man_dir_keyword="OTHER"
+cmake_xdgdata_dir_keyword="OTHER"
 cmake_data_dir=""
 cmake_doc_dir=""
 cmake_man_dir=""
+cmake_xdgdata_dir=""
 cmake_init_file=""
 cmake_bootstrap_system_libs=""
 cmake_bootstrap_qt_gui=""
@@ -214,6 +216,7 @@ fi
 cmake_data_dir_default="`cmake_install_dest_default DATA ${cmake_data_dir_keyword}`"
 cmake_doc_dir_default="`cmake_install_dest_default DOC ${cmake_doc_dir_keyword}`"
 cmake_man_dir_default="`cmake_install_dest_default MAN ${cmake_man_dir_keyword}`"
+cmake_xdgdata_dir_default="`cmake_install_dest_default XDGDATA ${cmake_xdgdata_dir_keyword}`"
 
 CMAKE_KNOWN_C_COMPILERS="cc gcc xlc icc tcc"
 CMAKE_KNOWN_CXX_COMPILERS="aCC xlC CC g++ c++ icc como "
@@ -428,6 +431,8 @@ Directory and file names:
                           ['"${cmake_doc_dir_default}"']
   --mandir=DIR            install man pages files in PREFIX/DIR/manN
                           ['"${cmake_man_dir_default}"']
+  --xdgdatadir=DIR        install XDG specific files in PREFIX/DIR
+                          ['"${cmake_xdgdata_dir_default}"']
 '
   exit 10
 }
@@ -616,6 +621,7 @@ while test $# != 0; do
   --datadir=*) cmake_data_dir=`cmake_arg "$1"` ;;
   --docdir=*) cmake_doc_dir=`cmake_arg "$1"` ;;
   --mandir=*) cmake_man_dir=`cmake_arg "$1"` ;;
+  --xdgdatadir=*) cmake_xdgdata_dir=`cmake_arg "$1"` ;;
   --init=*) cmake_init_file=`cmake_arg "$1"` ;;
   --system-libs) cmake_bootstrap_system_libs="${cmake_bootstrap_system_libs} -DCMAKE_USE_SYSTEM_LIBRARIES=1" ;;
   --no-system-libs) cmake_bootstrap_system_libs="${cmake_bootstrap_system_libs} -DCMAKE_USE_SYSTEM_LIBRARIES=0" ;;
@@ -1368,6 +1374,7 @@ set (CMAKE_INSTALL_PREFIX "'"${cmake_prefix_dir}"'" CACHE PATH "Install path pre
 set (CMAKE_DOC_DIR "'"${cmake_doc_dir}"'" CACHE PATH "Install location for documentation (relative to prefix)." FORCE)
 set (CMAKE_MAN_DIR "'"${cmake_man_dir}"'" CACHE PATH "Install location for man pages (relative to prefix)." FORCE)
 set (CMAKE_DATA_DIR "'"${cmake_data_dir}"'" CACHE PATH "Install location for data (relative to prefix)." FORCE)
+set (CMAKE_XDGDATA_DIR "'"${cmake_xdgdata_dir}"'" CACHE PATH "Install location for XDG specific files (relative to prefix)." FORCE)
 ' > "${cmake_bootstrap_dir}/InitialCacheFlags.cmake"
 
 # Add configuration settings given as command-line options.