diff --git a/lib/doc/LFUNs.lyx b/lib/doc/LFUNs.lyx
index 769735be6a..262bdc308c 100644
--- a/lib/doc/LFUNs.lyx
+++ b/lib/doc/LFUNs.lyx
@@ -4941,7 +4941,7 @@ Action Set debug output level.
 Syntax debug-level-set <LEVEL>
 \end_layout
 \begin_layout Description
-Params <LEVEL>: comma separated list of levels or the correspondent number of their combination. 0 is equivalent to disabling all debug 			events. See lyx -dbg for the current list of debug levels 			and their numbers.
+Params <LEVEL>: comma separated list of levels or the correspondent number of their combination. 0 is equivalent to disabling all debug events. See lyx -dbg for the current list of debug levels and their numbers.
 \end_layout
 \begin_layout Description
 Origin sanda, 28 Dec 2009
diff --git a/src/LyXAction.cpp b/src/LyXAction.cpp
index e7e978ffe6..c183d74c11 100644
--- a/src/LyXAction.cpp
+++ b/src/LyXAction.cpp
@@ -3233,8 +3233,8 @@ void LyXAction::init()
  * \li Syntax: debug-level-set <LEVEL>
  * \li Params: <LEVEL>: comma separated list of levels or the correspondent number
                         of their combination. 0 is equivalent to disabling all debug
-			events. See lyx -dbg for the current list of debug levels
-			and their numbers.
+                        events. See lyx -dbg for the current list of debug levels
+                        and their numbers.
  * \li Origin: sanda, 28 Dec 2009
  * \endvar
  */