diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index fcd5dd556676..274de31c9efa 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -294,6 +294,11 @@ else()
   set(ENABLE_PIC 0)
 endif()
 
+find_package(LibXml2)
+if (LIBXML2_FOUND)
+  set(CLANG_HAVE_LIBXML 1)
+endif ()
+
 include(CheckCXXCompilerFlag)
 
 check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG)
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index ca6412472991..ff765ccd373b 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -6,6 +6,9 @@
 /* Bug report URL. */
 #define BUG_REPORT_URL "${BUG_REPORT_URL}"
 
+/* Define if we have libxml2 */
+#cmakedefine CLANG_HAVE_LIBXML ${CLANG_HAVE_LIBXML}
+
 /* Relative directory for resource files */
 #define CLANG_RESOURCE_DIR "${CLANG_RESOURCE_DIR}"