diff --git a/src/mpl2/doc/debugMessages.md b/src/mpl2/doc/debugMessages.md
index c144c275c1..99342b0be1 100644
--- a/src/mpl2/doc/debugMessages.md
+++ b/src/mpl2/doc/debugMessages.md
@@ -35,5 +35,5 @@ MPL2 debug messages are divided in:
     * Simulated Anneling results for both SoftMacro and HardMacro.
 
 ### Bus Planning
-Special case for bus planning.
+Special case for bus planning with a single level.
 - Group Name: `bus_planning`