diff --git a/jode/jode/expr/CompareBinaryOperator.java b/jode/jode/expr/CompareBinaryOperator.java
index e708737..a6806f9 100644
--- a/jode/jode/expr/CompareBinaryOperator.java
+++ b/jode/jode/expr/CompareBinaryOperator.java
@@ -22,6 +22,7 @@ import jode.type.Type;
 import jode.decompiler.TabbedPrintWriter;
 
 public class CompareBinaryOperator extends Operator {
+    boolean allowsNaN = false;
     Type compareType;
 
     public CompareBinaryOperator(Type type, int op) {
@@ -30,6 +31,13 @@ public class CompareBinaryOperator extends Operator {
 	initOperands(2);
     }
 
+    public CompareBinaryOperator(Type type, int op, boolean allowsNaN) {
+        super(Type.tBoolean, op);
+	compareType = type;
+	this.allowsNaN = allowsNaN;
+	initOperands(2);
+    }
+
     public int getPriority() {
         switch (getOperatorIndex()) {
         case 26:
@@ -62,8 +70,7 @@ public class CompareBinaryOperator extends Operator {
     }
 
     public Expression negate() {
-	if ((getType() != Type.tFloat && getType() != Type.tDouble)
-	    || getOperatorIndex() <= NOTEQUALS_OP) {
+	if (!allowsNaN || getOperatorIndex() <= NOTEQUALS_OP) {
             setOperatorIndex(getOperatorIndex() ^ 1);
             return this;
         }