diff --git a/docs/source/io_formats/settings.rst b/docs/source/io_formats/settings.rst
index 7f58ee3ab..d1d9e69fa 100644
--- a/docs/source/io_formats/settings.rst
+++ b/docs/source/io_formats/settings.rst
@@ -1053,7 +1053,7 @@ sub-elements/attributes:
   :max_lower_bound_ratio:
     Maximum allowed ratio of a particle's weight to the weight window's lower
     bound. A factor will be applied to raise the weight window to be lower than
-	  the particle's weight by a factor of max_lower_bound_ratio during transport
+    the particle's weight by a factor of max_lower_bound_ratio during transport
     if exceeded.
 
   :max_split: