diff --git a/prism/src/jltl2ba/MyBitSet.java b/prism/src/jltl2ba/MyBitSet.java
index e95fc5b7..91551bb3 100644
--- a/prism/src/jltl2ba/MyBitSet.java
+++ b/prism/src/jltl2ba/MyBitSet.java
@@ -111,14 +111,6 @@ public class MyBitSet extends BitSet implements Comparable<BitSet>, Iterable<Int
 		return (tmp1.length() - tmp2.length());
 	}
 
-	@Override
-	public MyBitSet clone()
-	{
-		MyBitSet result = new MyBitSet(_size);
-		result.or(this);
-		return result;
-	}
-
 	public void increment() {
 		int i = this.nextClearBit(0);
 		this.clear(0,i);