diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5aa76c9a..9996c976 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,6 +58,7 @@ set(EXTRA_COMPILE_FLAGS " ")
 mark_as_advanced(
     EXIV2_TEAM_EXTRA_WARNINGS 
     EXIV2_TEAM_WARNINGS_AS_ERRORS
+    EXIV2_ENABLE_EXTERNAL_XMP
     EXTRA_COMPILE_FLAGS
 )
 
@@ -76,6 +77,10 @@ if( EXIV2_ENABLE_COMMERCIAL )
     set (EXIV2_ENABLE_NLS OFF)
 endif()
 
+if ( EXIV2_ENABLE_EXTERNAL_XMP )
+    set(EXIV2_ENABLE_XMP OFF)
+endif()
+
 if( EXIV2_BUILD_UNIT_TESTS )
     set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON) # Requires CMake 3.3.3
 endif()