diff --git a/src/LyXAction.cpp b/src/LyXAction.cpp
index e826522eec..6f02a8792e 100644
--- a/src/LyXAction.cpp
+++ b/src/LyXAction.cpp
@@ -4117,7 +4117,7 @@ void LyXAction::init()
                             toggleall.\n
                             Use lyx -dbg action for exact syntax of text-style
                             dialog parameters. The code is expecting numerical parameters, 
-			    so that one needs to use e.g. "series 1" instead of "series bold".
+                            so that one needs to use e.g. "series 1" instead of "series bold".
  * \li Sample: textstyle-update series 1
  * \li Origin: leeming, 12 Mar 2003
  * \endvar