diff --git a/mps/src/prmcfr.h b/mps/src/prmcfr.h
index 53d3fb75d4d..85c6ba0c14c 100644
--- a/mps/src/prmcfr.h
+++ b/mps/src/prmcfr.h
@@ -1,4 +1,4 @@
-/* impl.h.prmcli:  PROTECTION MUTATOR CONTEXT (FreeBSD)
+/* impl.h.prmcfr:  PROTECTION MUTATOR CONTEXT (FREEBSD)
  *
  * $HopeName: $
  * Copyright (C) 1998 The Harlequin Group Limited.  All rights reserved.
diff --git a/mps/src/vmfr.c b/mps/src/vmfr.c
index 5c3b8bea774..ca0c9edda27 100644
--- a/mps/src/vmfr.c
+++ b/mps/src/vmfr.c
@@ -1,4 +1,4 @@
-/* impl.c.vmli: VIRTUAL MEMORY MAPPING FOR FreeBSD
+/* impl.c.vmfr: VIRTUAL MEMORY MAPPING FOR FreeBSD
  *
  * $HopeName: MMsrc!vmli.c(trunk.7) $
  * Copyright (C) 2000 Harlequin Limited.  All rights reserved.