diff --git a/src/beast/base/evolution/alignment/Alignment.java b/src/beast/base/evolution/alignment/Alignment.java
index d1ba69c8..af94cbb7 100644
--- a/src/beast/base/evolution/alignment/Alignment.java
+++ b/src/beast/base/evolution/alignment/Alignment.java
@@ -974,5 +974,10 @@ public void restore() {
 		// TODO Auto-generated method stub
 		
 	}
+
 	
+	@Override
+	public boolean notCloneable() {
+		return true;
+	}
 } // class Data