diff --git a/bin/ai/regression/regression.nut b/bin/ai/regression/regression.nut
--- a/bin/ai/regression/regression.nut
+++ b/bin/ai/regression/regression.nut
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 import("queue.priority_queue", "PQ", 2);
 import("queue.binary_heap", "BH", 1);
 import("queue.fibonacci_heap", "FH", 1);