diff --git a/include/freetype/config/ftoption.h b/include/freetype/config/ftoption.h
index 7e07246bf..ca47c03f6 100644
--- a/include/freetype/config/ftoption.h
+++ b/include/freetype/config/ftoption.h
@@ -473,7 +473,7 @@ FT_BEGIN_HEADER
    *   Do not `#undef` this macro here since the build system might define it
    *   for certain configurations only.
    */
-/* #define FT_DEBUG_MEMORY */
+#define FT_DEBUG_MEMORY
 
 
   /**************************************************************************