diff --git a/config/ftoption.h b/config/ftoption.h
index 14d2c777a..ef715ff44 100644
--- a/config/ftoption.h
+++ b/config/ftoption.h
@@ -60,7 +60,7 @@
   /*   All convenience functions are declared as such in their             */
   /*   documentation.                                                      */
   /*                                                                       */
-#undef FT_CONFIG_OPTION_NO_CONVENIENCE_FUNCS
+#undef  FT_CONFIG_OPTION_NO_CONVENIENCE_FUNCS
 
   /*************************************************************************/
   /*                                                                       */
@@ -203,6 +203,15 @@
 #undef  FT_CONFIG_OPTION_BIG_ENDIAN
 
 
+  /*************************************************************************/
+  /*                                                                       */
+  /* Computation Algorithms                                                */
+  /*                                                                       */
+  /*   Used for debugging, this configuration macro should disappear       */
+  /*   soon..                                                              */
+  /*                                                                       */
+#define FT_CONFIG_OPTION_OLD_CALCS
+
   /*************************************************************************/
   /*                                                                       */
   /*    The size in bytes of the render pool used by the scan-line         */