diff --git a/src/main/org/apache/ant/compress/taskdefs/Undeflate64.java b/src/main/org/apache/ant/compress/taskdefs/Undeflate64.java
index 0b9a3f4..c48839d 100644
--- a/src/main/org/apache/ant/compress/taskdefs/Undeflate64.java
+++ b/src/main/org/apache/ant/compress/taskdefs/Undeflate64.java
@@ -30,8 +30,6 @@
  */
 public final class Undeflate64 extends UnpackBase {
 
-    private boolean zlibHeader = true;
-
     public Undeflate64() {
         super(".dfl64", new Deflate64StreamFactory());
     }