diff --git a/nav2_smac_planner/README.md b/nav2_smac_planner/README.md
index bb404afc3d..c96df8da17 100644
--- a/nav2_smac_planner/README.md
+++ b/nav2_smac_planner/README.md
@@ -188,7 +188,7 @@ When tuning, the "reasonable" range for each penalty is listed below. While you
 - Change: 0.0 - 0.3
 - Reverse: 1.3 - 5.0
 
-Note that change penalty must be greater than 0.0. The Non-staight, reverse, and cost penalties must be greater than 1.0, strictly.
+Note that change penalty must be greater than 0.0. The non-straight, reverse, and cost penalties must be greater than 1.0, strictly.
 
 ### No path found for clearly valid goals or long compute times