diff --git a/AlgebraicDataflowArchitectureModel/src/models/controlFlowModel/CallEdge.java b/AlgebraicDataflowArchitectureModel/src/models/controlFlowModel/CallEdge.java
index d7af3fb..ade5382 100644
--- a/AlgebraicDataflowArchitectureModel/src/models/controlFlowModel/CallEdge.java
+++ b/AlgebraicDataflowArchitectureModel/src/models/controlFlowModel/CallEdge.java
@@ -4,7 +4,7 @@
 import models.dataFlowModel.PushPullValue;
 
 public class CallEdge extends Edge {
-	private PushPullValue selectedOption = PushPullValue.PUSHorPULL;
+	private final PushPullValue selectedOption;
 	
 	public CallEdge(ObjectNode src, ObjectNode dst, PushPullValue selectedOption) {
 		super(src, dst);