diff --git a/src/main/java/fr/ntr/scheduler/RoundRobin.java b/src/main/java/fr/ntr/scheduler/RoundRobin.java
index 920e5b9..4790b24 100644
--- a/src/main/java/fr/ntr/scheduler/RoundRobin.java
+++ b/src/main/java/fr/ntr/scheduler/RoundRobin.java
@@ -62,7 +62,7 @@ public class RoundRobin extends Scheduler {
 		//	}
 		//}
 
-		index = Ts * Sp;
+		index = (Ts + 1) * (Sp + 1);
 		return Users.get(index%(Users.size() - 1));
 
 	}