diff --git a/options.h b/options.h
index 558ec940c..8517e12e1 100644
--- a/options.h
+++ b/options.h
@@ -1,5 +1,5 @@
 /*
- *  CU sudo version 
+ *  CU sudo version 1.5.6
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
diff --git a/parse.yacc b/parse.yacc
index a467ffeef..8ec8b71ec 100644
--- a/parse.yacc
+++ b/parse.yacc
@@ -1,7 +1,7 @@
 %{
 
 /*
- *  CU sudo version 
+ *  CU sudo version 1.5.6
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
diff --git a/pathnames.h.in b/pathnames.h.in
index 2cafae6c5..03705d174 100644
--- a/pathnames.h.in
+++ b/pathnames.h.in
@@ -1,5 +1,5 @@
 /*
- *  CU sudo version 
+ *  CU sudo version 1.5.6
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by