diff --git a/src/acconfig.h b/src/acconfig.h
index 05f7fff6dded67dc7ae19eff442f4849d344a929..8e856a1838b38b63d0ffae4cf9456a88d25385f2 100644
--- a/src/acconfig.h
+++ b/src/acconfig.h
@@ -1,5 +1,5 @@
 /*
- * $Id: acconfig.h,v 1.19 1998/03/28 15:41:37 grubba Exp $
+ * $Id: acconfig.h,v 1.20 1998/04/13 14:14:41 grubba Exp $
  */
 #ifndef MACHINE_H
 #define MACHINE_H
@@ -189,6 +189,12 @@
 /* Enable code to handle Out-Of-Band data */
 #undef WITH_OOB
 
+/* Enable individual tracing of threads */
+#undef TRACE_THREADS
+
+/* Enable tracing of the compiler */
+#undef YYDEBUG
+
 @BOTTOM@
 
 /* NT stuff */