diff --git a/Modules/exportheader.cmake.in b/Modules/exportheader.cmake.in
index 7058f545a..7cfbcbda4 100644
--- a/Modules/exportheader.cmake.in
+++ b/Modules/exportheader.cmake.in
@@ -34,7 +34,9 @@
 #endif
 
 #if @DEFINE_NO_DEPRECATED@ /* DEFINE_NO_DEPRECATED */
-# define @NO_DEPRECATED_MACRO_NAME@
+#  ifndef @NO_DEPRECATED_MACRO_NAME@
+#    define @NO_DEPRECATED_MACRO_NAME@
+#  endif
 #endif
 
 #endif