diff --git a/lib/gssapi/gssapi_mech.h b/lib/gssapi/gssapi_mech.h
index a8aa79c5a..2e76f065c 100644
--- a/lib/gssapi/gssapi_mech.h
+++ b/lib/gssapi/gssapi_mech.h
@@ -4,6 +4,8 @@
  * (Royal Institute of Technology, Stockholm, Sweden).
  * All rights reserved.
  *
+ * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
diff --git a/lib/gssapi/mech/gss_acquire_cred_from.c b/lib/gssapi/mech/gss_acquire_cred_from.c
index 51438e938..24847cfd7 100644
--- a/lib/gssapi/mech/gss_acquire_cred_from.c
+++ b/lib/gssapi/mech/gss_acquire_cred_from.c
@@ -2,6 +2,7 @@
  * Copyright (c) 2005 Doug Rabson
  * All rights reserved.
  *
+ * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
  * Portions Copyright (c) 2011, 2018 PADL Software Pty Ltd.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/lib/gssapi/mech/gss_canonicalize_name.c b/lib/gssapi/mech/gss_canonicalize_name.c
index 419229229..8ffeec78f 100644
--- a/lib/gssapi/mech/gss_canonicalize_name.c
+++ b/lib/gssapi/mech/gss_canonicalize_name.c
@@ -2,6 +2,8 @@
  * Copyright (c) 2005 Doug Rabson
  * All rights reserved.
  *
+ * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
diff --git a/lib/gssapi/mech/gss_compare_name.c b/lib/gssapi/mech/gss_compare_name.c
index 3fa5f24d9..781a8bf21 100644
--- a/lib/gssapi/mech/gss_compare_name.c
+++ b/lib/gssapi/mech/gss_compare_name.c
@@ -2,6 +2,8 @@
  * Copyright (c) 2005 Doug Rabson
  * All rights reserved.
  *
+ * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
diff --git a/lib/gssapi/mech/gss_init_sec_context.c b/lib/gssapi/mech/gss_init_sec_context.c
index 3f2bba288..d8dc9c86b 100644
--- a/lib/gssapi/mech/gss_init_sec_context.c
+++ b/lib/gssapi/mech/gss_init_sec_context.c
@@ -2,6 +2,8 @@
  * Copyright (c) 2005 Doug Rabson
  * All rights reserved.
  *
+ * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met: