diff --git a/mythtv/libs/libmythtv/DetectLetterbox.h b/mythtv/libs/libmythtv/DetectLetterbox.h
index bf8f60c7496..e3757f360a8 100644
--- a/mythtv/libs/libmythtv/DetectLetterbox.h
+++ b/mythtv/libs/libmythtv/DetectLetterbox.h
@@ -1,3 +1,6 @@
+#ifndef MYTHDETECTLETTERBOX_H
+#define MYTHDETECTLETTERBOX_H
+
 // MythTV
 #include "mythplayer.h"
 
@@ -26,4 +29,4 @@ class MTV_PUBLIC DetectLetterbox
     QMutex         m_detectLetterboxLock;
 };
 
-/* vim: set expandtab tabstop=4 shiftwidth=4: */
+#endif