3 files changed, 5 insertions, 2 deletions
diff --git a/README.md b/README.md
index 7f6904cf..9a3eba55 100644
--- a/README.md
+++ b/README.md
@@ -556,7 +556,7 @@ GitHub.
  * Copyright (c) 1991-1996 by Xerox Corporation.  All rights reserved.
  * Copyright (c) 1996-1999 by Silicon Graphics.  All rights reserved.
  * Copyright (c) 1999-2011 by Hewlett-Packard Development Company.
- * Copyright (c) 2009-2018 Ivan Maidanski
+ * Copyright (c) 2008-2018 Ivan Maidanski
 
 The files pthread_stop_world.c, pthread_support.c and some others are also
 
diff --git a/alloc.c b/alloc.c
index 9444a87a..fc01d772 100644
--- a/alloc.c
+++ b/alloc.c
@@ -3,6 +3,7 @@
  * Copyright (c) 1991-1996 by Xerox Corporation.  All rights reserved.
  * Copyright (c) 1998 by Silicon Graphics.  All rights reserved.
  * Copyright (c) 1999-2004 Hewlett-Packard Development Company, L.P.
+ * Copyright (c) 2008-2018 Ivan Maidanski
  *
  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
@@ -119,10 +120,11 @@ EXTERN_C_BEGIN
 extern const char * const GC_copyright[];
 EXTERN_C_END
 const char * const GC_copyright[] =
-{"Copyright 1988,1989 Hans-J. Boehm and Alan J. Demers ",
+{"Copyright 1988, 1989 Hans-J. Boehm and Alan J. Demers ",
 "Copyright (c) 1991-1995 by Xerox Corporation.  All rights reserved. ",
 "Copyright (c) 1996-1998 by Silicon Graphics.  All rights reserved. ",
 "Copyright (c) 1999-2009 by Hewlett-Packard Company.  All rights reserved. ",
+"Copyright (c) 2008-2018 Ivan Maidanski ",
 "THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY",
 " EXPRESSED OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.",
 "See source code for details." };
diff --git a/extra/gc.c b/extra/gc.c
index 5cd3f7bf..8e2446a2 100644
--- a/extra/gc.c
+++ b/extra/gc.c
@@ -4,6 +4,7 @@
  * Copyright (c) 1998 by Fergus Henderson.  All rights reserved.
  * Copyright (c) 2000-2009 by Hewlett-Packard Development Company.
  * All rights reserved.
+ * Copyright (c) 2009-2018 Ivan Maidanski
  *
  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.