diff --git a/ArduCopter/Parameters.pde b/ArduCopter/Parameters.pde
index 5f779fa75e..0b8600406f 100644
--- a/ArduCopter/Parameters.pde
+++ b/ArduCopter/Parameters.pde
@@ -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 -*-
 
 /*
  *  ArduCopter parameter definitions