diff --git a/prolog.nanorc b/prolog.nanorc
index d6e2a34..ff62052 100644
--- a/prolog.nanorc
+++ b/prolog.nanorc
@@ -32,4 +32,4 @@ color white start="/\*" end="\*/"
 color black,yellow "(BUG|DEBUG|FIXME|IDEA|NOTE|REVIEW|TEMP|TODO|WARNING|XXX)"
 
 # Spaces in front of tabs
-color ,red " +  +"
+color ,red " +	+"