--- a/industry_cmd.c	Wed Aug 16 17:58:43 2006 +0000
+++ b/industry_cmd.c	Thu Aug 17 20:22:35 2006 +0000
@@ -1647,8 +1647,8 @@
 
 	type = _new_industry_rand[_opt.landscape][GB(r, 16, 5)];
 
-	if (type == IT_OIL_WELL && _date > 10958) return;
-	if (type == IT_OIL_RIG  && _date < 14610) return;
+	if (type == IT_OIL_WELL && _cur_year > 1950) return;
+	if (type == IT_OIL_RIG  && _cur_year < 1960) return;
 
 	j = 2000;
 	for (;;) {