diff --git a/mavlink_sha256.h b/mavlink_sha256.h
index ff22b5f5c..e6e96258b 100644
--- a/mavlink_sha256.h
+++ b/mavlink_sha256.h
@@ -5,7 +5,7 @@
   modifications to suit mavlink headers
  */
 /*
- * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
+ * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
  * (Royal Institute of Technology, Stockholm, Sweden).
  * All rights reserved.
  * 
@@ -24,7 +24,7 @@
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS "AS IS" AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE