--- common.h.orig	Wed Jan  5 10:42:00 1994
+++ common.h	Tue Aug 22 02:49:35 2000
@@ -73,7 +73,9 @@
 #endif
 
 #ifdef  UNIX
+#ifndef         TABLES_PATH
 #define         TABLES_PATH     "tables"  /* to find data files */
+#endif       /* TABLES_PATH */
 /* name of environment variable holding path of table files */
 #define         MPEGTABENV      "MPEGTABLES"
 #define         PATH_SEPARATOR  "/"        /* how to build paths */
