diff --git a/AlgebraicDataflowArchitectureModel/src/simulator/states/PrimitiveResourceState.java b/AlgebraicDataflowArchitectureModel/src/simulator/states/PrimitiveResourceState.java
index adfb7f3..19db331 100644
--- a/AlgebraicDataflowArchitectureModel/src/simulator/states/PrimitiveResourceState.java
+++ b/AlgebraicDataflowArchitectureModel/src/simulator/states/PrimitiveResourceState.java
@@ -26,6 +26,7 @@
 	}
 	
 	public Object clone() {
-		return this;
+		if (value == null) return new PrimitiveResourceState(null);
+		return new PrimitiveResourceState((Constant) value.clone());
 	}
 }