diff --git a/preferences.xml b/preferences.xml
index ba591ae26..2f23ae469 100644
--- a/preferences.xml
+++ b/preferences.xml
@@ -262,7 +262,7 @@ Started September 2000 by David Megginson, david@megginson.com
   </ATC>
 
   <ai-traffic>
-   <enabled type="bool">true</enabled>
+   <enabled type="bool">true</enabled>
    <level type="int">2</level>
   </ai-traffic>