diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultModel.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultModel.java
index dc600939..fe72bfea 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultModel.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultModel.java
@@ -2,6 +2,7 @@ package de.dhbwstuttgart.typeinference.unify;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 import de.dhbwstuttgart.typeinference.result.ResultSet;
 
@@ -17,7 +18,7 @@ public class UnifyResultModel {
 		listeners.remove(listenerToRemove);
 	}
 	
-	public void notify(Set<ResultSet> newResult) {
+	public void notify(List<ResultSet> newResult) {
 		UnifyResultEvent evt = new UnifyResultEvent(newResult);
 		
 		for (UnifyResultListener listener : listeners) {