diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index 9e1de250..12480eae 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -58,6 +58,8 @@ if(NOT WIN32)
         set(XML_DEV_URANDOM 0)
     endif(XML_DEV_URANDOM)
 endif()
+option(XML_UNICODE "Use UTF-16 encoded chars (two bytes) instead of UTF-8" OFF)
+option(XML_UNICODE_WCHAR_T "Use wchar_t to represent UTF-16 instead of unsigned short" OFF)
 
 if(XML_DTD)
     set(XML_DTD 1)
@@ -69,6 +71,17 @@ if(XML_NS)
 else(XML_NS)
     set(XML_NS 0)
 endif(XML_NS)
+if(XML_UNICODE)
+    set(XML_UNICODE 1)
+else(XML_UNICODE)
+    set(XML_UNICODE 0)
+endif(XML_UNICODE)
+if(XML_UNICODE_WCHAR_T)
+    set(XML_UNICODE_WCHAR_T 1)
+else(XML_UNICODE_WCHAR_T)
+    set(XML_UNICODE_WCHAR_T 0)
+endif(XML_UNICODE_WCHAR_T)
+
 
 if(BUILD_tests)
     enable_testing()
diff --git a/expat/expat_config.h.cmake b/expat/expat_config.h.cmake
index d2dcd801..3e23f487 100644
--- a/expat/expat_config.h.cmake
+++ b/expat/expat_config.h.cmake
@@ -99,6 +99,12 @@
 #cmakedefine XML_DEV_URANDOM
 #endif
 
+/* Define to use UTF-16 chars (two bytes). */
+#cmakedefine XML_UNICODE
+
+/* Define to use wchar_t as UTF-16 char type instead of unsigned short. */
+#cmakedefine XML_UNICODE_WCHAR_T
+
 /* Define to __FUNCTION__ or "" if `__func__' does not conform to ANSI C. */
 #ifdef _MSC_VER
 # define __func__ __FUNCTION__