diff --git a/nav2_simple_commander/nav2_simple_commander/costmap_2d.py b/nav2_simple_commander/nav2_simple_commander/costmap_2d.py
index c442e09ee68..186d198fdb6 100644
--- a/nav2_simple_commander/nav2_simple_commander/costmap_2d.py
+++ b/nav2_simple_commander/nav2_simple_commander/costmap_2d.py
@@ -39,7 +39,8 @@ def __init__(self, occupancy_map):
 
         Args:
         ----
-            occupancy_map: Abscissa of the initial point.
+        occupancy_map: dict
+            Abscissa of the initial point.
 
         """
         if type(34) not in [int, float]: