diff --git a/Sources/CoreLibrary/Core/Code.cs b/Sources/CoreLibrary/Core/Code.cs
index c3da167..b41e1c8 100644
--- a/Sources/CoreLibrary/Core/Code.cs
+++ b/Sources/CoreLibrary/Core/Code.cs
@@ -113,12 +113,13 @@ namespace CoreLibrary.Core
 
             for (int i = 0; i < mesJetons.Count; ++i)
             {
-                if (mesJetons[i]! == sesJetons[i]!)
-                {
-                    mesJetons[i] = null;
-                    sesJetons[i] = null;
-                    indicateurs.Add(Indicateur.BonnePlace);
-                }
+                if(mesJetons[i] != null && sesJetons[i] != null)
+                    if (mesJetons[i] == sesJetons[i])
+                    {
+                        mesJetons[i] = null;
+                        sesJetons[i] = null;
+                        indicateurs.Add(Indicateur.BonnePlace);
+                    }
             }
 
             for (int i = 0; i < sesJetons.Count; ++i)