diff --git a/test/linedata.h b/test/linedata.h
index 751bc6b..f042ab4 100644
--- a/test/linedata.h
+++ b/test/linedata.h
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 2009-2010,2012 Free Software Foundation, Inc.              *
+ * Copyright 2018,2020 Thomas E. Dickey                                     *
+ * Copyright 2009-2010,2012 Free Software Foundation, Inc.                  *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -26,6 +27,16 @@
  * authorization.                                                           *
  ****************************************************************************/
 
+/*
+ * $Id: linedata.h,v 1.8 2020/02/02 23:34:34 tom Exp $
+ *
+ * Utility functions for reading a line of text from a file.
+ */
+#ifndef LINEDATA_H_incl
+#define LINEDATA_H_incl 1
+
+#include <test.priv.h>
+
 #define isQUIT(c)     ((c) == QUIT || (c) == ESCAPE)
 
 #define key_RECUR     CTRL('W')
@@ -96,3 +107,5 @@
     }
     return result;
 }
+
+#endif /* LINEDATA_H_incl */