diff --git a/Modules/FindDoxygen.cmake b/Modules/FindDoxygen.cmake
index 2ed944980a..cb4738bab4 100644
--- a/Modules/FindDoxygen.cmake
+++ b/Modules/FindDoxygen.cmake
@@ -708,7 +708,9 @@ if(TARGET Doxygen::doxygen)
         if(_line MATCHES "([A-Z][A-Z0-9_]+)( *=)(.*)")
             set(_key "${CMAKE_MATCH_1}")
             set(_eql "${CMAKE_MATCH_2}")
-            string(REPLACE ";" "\\\n" _value "${CMAKE_MATCH_3}")
+            set(_value "${CMAKE_MATCH_3}")
+            string(REPLACE "\\" "\\\\" _value "${_value}")
+            string(REPLACE ";" "\\\n" _value "${_value}")
             list(APPEND _Doxygen_tpl_params "${_key}${_eql}${_value}")
         endif()
     endforeach()