diff --git a/jode/jode/expr/ConstructorOperator.java b/jode/jode/expr/ConstructorOperator.java
index 1a90090..d68cd55 100644
--- a/jode/jode/expr/ConstructorOperator.java
+++ b/jode/jode/expr/ConstructorOperator.java
@@ -22,7 +22,7 @@ import jode.Type;
 import jode.MethodType;
 
 public class ConstructorOperator extends Operator 
-    implements CombineableOperator {
+    implements MatchableOperator {
     MethodType methodType;
     Type classType;
 
@@ -43,13 +43,6 @@ public class ConstructorOperator extends Operator
 	return expr.containsConflictingLoad(this);
     }
 
-    /**
-     * Makes a non void expression out of this invoke instruction.
-     */
-    public void makeNonVoid() {
-	throw new jode.AssertError("already non void");
-    }
-
     /**
      * Checks if the value of the operator can be changed by this expression.
      */