--- ./config.hin	Fri Apr  5 16:49:39 2002
+++ ../diffutils-2.8.1/./config.hin	Tue May 28 16:07:30 2002
@@ -12,10 +12,14 @@
 #undef C_ALLOCA
 
 /* Name of "diff" program, unless overridden. */
+#ifndef DEFAULT_DIFF_PROGRAM
 #undef DEFAULT_DIFF_PROGRAM
+#endif
 
 /* Name of editor program, unless overridden. */
+#ifndef DEFAULT_EDITOR_PROGRAM
 #undef DEFAULT_EDITOR_PROGRAM
+#endif
 
 /* Define to 1 if translation of program messages to the user's native
    language is requested. */