diff --git a/libraries/AP_Menu/AP_Menu.cpp b/libraries/AP_Menu/AP_Menu.cpp
index 6515487676..4199863be4 100644
--- a/libraries/AP_Menu/AP_Menu.cpp
+++ b/libraries/AP_Menu/AP_Menu.cpp
@@ -1,4 +1,4 @@
-// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: t -*-
+// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 //
 // Simple commandline menu system.
diff --git a/libraries/AP_Menu/AP_Menu.h b/libraries/AP_Menu/AP_Menu.h
index efe04bdb43..6c75463193 100644
--- a/libraries/AP_Menu/AP_Menu.h
+++ b/libraries/AP_Menu/AP_Menu.h
@@ -1,4 +1,4 @@
-// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: t -*-
+// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 /// @file	menu.h
 /// @brief	Simple commandline menu subsystem.