diff --git a/code/ExercisesCheatSheet.md b/code/ExercisesCheatSheet.md
index 21a015c08bd875231d0e19d30636cc4a015a3ed5..41bc44759e6f70acfb5dc0c517bbd2bb61afc420 100644
--- a/code/ExercisesCheatSheet.md
+++ b/code/ExercisesCheatSheet.md
@@ -11,7 +11,7 @@ No actual exercise, only setup of the environment, using the "hello" exercise.
 
 Day 2
 -----
-### polymorphim
+### polymorphism
 First create a Pentagon and an Hexagon and call computePerimeter. Can be used to break the ice.
 Second step is to call parent's computePerimeter methods meaning :
 ```cpp