diff --git a/mach/pdp/cg/mach.c b/mach/pdp/cg/mach.c
index 1f8c0dea7..cd33ca5d1 100644
--- a/mach/pdp/cg/mach.c
+++ b/mach/pdp/cg/mach.c
@@ -1,3 +1,7 @@
+#ifndef NORCSID
+static char rcsid[] = "$Header$";
+#endif
+
 /*
  * (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
  *
diff --git a/mach/pdp/cg/mach.h b/mach/pdp/cg/mach.h
index db107c1d4..ec06f42a2 100644
--- a/mach/pdp/cg/mach.h
+++ b/mach/pdp/cg/mach.h
@@ -1,3 +1,5 @@
+/* $Header$ */
+
 #define ex_ap(y)	fprintf(codefile,"\t.globl %s\n",y)
 #define in_ap(y)	/* nothing */