diff --git a/WHATSNEW b/WHATSNEW
index a7f77d27a..3a782c5cb 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -101,6 +101,9 @@ Other changes:
 
 * mail task accepts nested header element.  Bugzilla report 24713.
 
+* zip/jar/war/ear supports level attribute for deflate compression level.
+  Bugzilla report 25513.
+
 Changes from Ant 1.6.2 to current Ant 1.6 CVS version
 =====================================================
 
diff --git a/docs/manual/CoreTasks/ear.html b/docs/manual/CoreTasks/ear.html
index 16277ef30..64ce70a2d 100644
--- a/docs/manual/CoreTasks/ear.html
+++ b/docs/manual/CoreTasks/ear.html
@@ -134,6 +134,13 @@ to a value other than its default, <code>&quot;add&quot;</code>.</b></p>
     Defaults to true.  <em>Since Ant 1.6.2</em></td>
     <td align="center" valign="top">No</td>
   </tr>
+  <tr>
+    <td valign="top">level</td>
+    <td valign="top">Non-default level at which file compression should be
+    performed. Valid values range from 0 (no compression/fastest) to 9
+    (maximum compression/slowest). <em>Since Ant 1.7</em></td>
+    <td valign="top" align="center">No</td>
+  </tr>
 </table>
 <h3>Nested elements</h3>
 <h4>metainf</h4>
diff --git a/docs/manual/CoreTasks/jar.html b/docs/manual/CoreTasks/jar.html
index ca7aa873d..bfba2a4d1 100644
--- a/docs/manual/CoreTasks/jar.html
+++ b/docs/manual/CoreTasks/jar.html
@@ -194,6 +194,13 @@ to a value other than its default, <code>&quot;add&quot;</code>.</b></p>
     Defaults to true.  <em>Since Ant 1.6.2</em></td>
     <td align="center" valign="top">No</td>
   </tr>
+  <tr>
+    <td valign="top">level</td>
+    <td valign="top">Non-default level at which file compression should be
+    performed. Valid values range from 0 (no compression/fastest) to 9
+    (maximum compression/slowest). <em>Since Ant 1.7</em></td>
+    <td valign="top" align="center">No</td>
+  </tr>
 </table>
 
 <h3>Nested elements</h3>
diff --git a/docs/manual/CoreTasks/war.html b/docs/manual/CoreTasks/war.html
index 9bd84e3db..48ada4436 100644
--- a/docs/manual/CoreTasks/war.html
+++ b/docs/manual/CoreTasks/war.html
@@ -141,6 +141,13 @@ to a value other than its default, <code>&quot;add&quot;</code>.</b></p>
     Defaults to true.  <em>Since Ant 1.6.2</em></td>
     <td align="center" valign="top">No</td>
   </tr>
+  <tr>
+    <td valign="top">level</td>
+    <td valign="top">Non-default level at which file compression should be
+    performed. Valid values range from 0 (no compression/fastest) to 9
+    (maximum compression/slowest). <em>Since Ant 1.7</em></td>
+    <td valign="top" align="center">No</td>
+  </tr>
 </table>
 <h3>Nested elements</h3>
 <h4>lib</h4>
diff --git a/docs/manual/CoreTasks/zip.html b/docs/manual/CoreTasks/zip.html
index 6a0ea3412..1243904b8 100644
--- a/docs/manual/CoreTasks/zip.html
+++ b/docs/manual/CoreTasks/zip.html
@@ -189,6 +189,13 @@ to a value other than its default, <code>&quot;add&quot;</code>.</b></p>
     <td valign="top">Comment to store in the archive. <em>Since Ant 1.6.3</em></td>
     <td valign="top" align="center">No</td>
   </tr>
+  <tr>
+    <td valign="top">level</td>
+    <td valign="top">Non-default level at which file compression should be
+    performed. Valid values range from 0 (no compression/fastest) to 9
+    (maximum compression/slowest). <em>Since Ant 1.7</em></td>
+    <td valign="top" align="center">No</td>
+  </tr>
 </table>
 <h3>Parameters specified as nested elements</h3>
 <h4>fileset</h4>
diff --git a/src/etc/testcases/taskdefs/zip.xml b/src/etc/testcases/taskdefs/zip.xml
index f2acdc366..d50bb8bf6 100644
--- a/src/etc/testcases/taskdefs/zip.xml
+++ b/src/etc/testcases/taskdefs/zip.xml
@@ -139,6 +139,23 @@
       <zip destfile="test3.zip" basedir="empty" whenempty="create" includes="*.xyz"/>
   </target>
 
+  <target name="testCompressionLevel" depends="test6">
+    <length property="test6.length" file="test6.zip" />
+    <zip destFile="testLevel.zip" basedir="." level="9">
+      <include name="*.xml" />
+      <exclude name="zip.*" />
+    </zip>
+    <fail>
+      <condition>
+        <not>
+          <isfileselected file="testLevel.zip">
+            <size when="less" value="${test6.length}" />
+          </isfileselected>
+        </not>
+      </condition>
+    </fail>
+  </target>
+
   <target name="cleanup">
     <delete file="test3.zip"/>
     <delete file="test4.zip"/>
diff --git a/src/main/org/apache/tools/ant/taskdefs/Zip.java b/src/main/org/apache/tools/ant/taskdefs/Zip.java
index 5598d5b77..e0db2e9da 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Zip.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Zip.java
@@ -120,6 +120,8 @@ public class Zip extends MatchingTask {
      */
     private String comment = "";
 
+    private int level = ZipOutputStream.DEFAULT_COMPRESSION;
+
     /**
      * This is the name/location of where to
      * create the .zip file.
@@ -335,6 +337,25 @@ public class Zip extends MatchingTask {
         return comment;
     }
 
+    /**
+     * Set the compression level to use.  Default is
+     * ZipOutputStream.DEFAULT_COMPRESSION.
+     * @param level compression level.
+     * @since Ant 1.7
+     */
+    public void setLevel(int level) {
+        this.level = level;
+    }
+
+    /**
+     * Get the compression level.
+     * @return compression level.
+     * @since Ant 1.7
+     */
+    public int getLevel() {
+        return level;
+    }
+
     /**
      * Whether the file modification times will be rounded up to the
      * next even number of seconds.
@@ -481,16 +502,13 @@ public class Zip extends MatchingTask {
 
             ZipOutputStream zOut = null;
             try {
-
                 if (!skipWriting) {
                     zOut = new ZipOutputStream(zipFile);
 
                     zOut.setEncoding(encoding);
-                    if (doCompress) {
-                        zOut.setMethod(ZipOutputStream.DEFLATED);
-                    } else {
-                        zOut.setMethod(ZipOutputStream.STORED);
-                    }
+                    zOut.setMethod(doCompress
+                        ? ZipOutputStream.DEFLATED : ZipOutputStream.STORED);
+                    zOut.setLevel(level);
                 }
                 initZipOutputStream(zOut);
 
@@ -1080,12 +1098,12 @@ public class Zip extends MatchingTask {
             ze.setMethod(doCompress ? ZipEntry.DEFLATED : ZipEntry.STORED);
 
             /*
-            * ZipOutputStream.putNextEntry expects the ZipEntry to
-            * know its size and the CRC sum before you start writing
-            * the data when using STORED mode - unless it is seekable.
-            *
-            * This forces us to process the data twice.
-            */
+             * ZipOutputStream.putNextEntry expects the ZipEntry to
+             * know its size and the CRC sum before you start writing
+             * the data when using STORED mode - unless it is seekable.
+             *
+             * This forces us to process the data twice.
+             */
             if (!zOut.isSeekable() && !doCompress) {
                 long size = 0;
                 CRC32 cal = new CRC32();
diff --git a/src/main/org/apache/tools/zip/ZipOutputStream.java b/src/main/org/apache/tools/zip/ZipOutputStream.java
index bb530dac7..c2d9926de 100644
--- a/src/main/org/apache/tools/zip/ZipOutputStream.java
+++ b/src/main/org/apache/tools/zip/ZipOutputStream.java
@@ -54,6 +54,27 @@ import java.util.zip.ZipException;
  */
 public class ZipOutputStream extends FilterOutputStream {
 
+    /**
+     * Compression method for deflated entries.
+     *
+     * @since 1.1
+     */
+    public static final int DEFLATED = java.util.zip.ZipEntry.DEFLATED;
+
+    /**
+     * Default compression level for deflated entries.
+     *
+     * @since Ant 1.7
+     */
+    public static final int DEFAULT_COMPRESSION = Deflater.DEFAULT_COMPRESSION;
+
+    /**
+     * Compression method for stored entries.
+     *
+     * @since 1.1
+     */
+    public static final int STORED = java.util.zip.ZipEntry.STORED;
+
     /**
      * Current entry.
      *
@@ -73,7 +94,7 @@ public class ZipOutputStream extends FilterOutputStream {
      *
      * @since 1.1
      */
-    private int level = Deflater.DEFAULT_COMPRESSION;
+    private int level = DEFAULT_COMPRESSION;
 
     /**
      * Has the compression level changed when compared to the last
@@ -182,7 +203,7 @@ public class ZipOutputStream extends FilterOutputStream {
      *
      * @since 1.14
      */
-    protected Deflater def = new Deflater(Deflater.DEFAULT_COMPRESSION, true);
+    protected Deflater def = new Deflater(level, true);
 
     /**
      * This buffer servers as a Deflater.
@@ -203,20 +224,6 @@ public class ZipOutputStream extends FilterOutputStream {
      */
     private RandomAccessFile raf = null;
 
-    /**
-     * Compression method for deflated entries.
-     *
-     * @since 1.1
-     */
-    public static final int DEFLATED = java.util.zip.ZipEntry.DEFLATED;
-
-    /**
-     * Compression method for stored entries.
-     *
-     * @since 1.1
-     */
-    public static final int STORED = java.util.zip.ZipEntry.STORED;
-
     /**
      * Creates a new ZIP OutputStream filtering the underlying stream.
      * @param out the outputstream to zip
@@ -430,10 +437,16 @@ public class ZipOutputStream extends FilterOutputStream {
      * Sets the compression level for subsequent entries.
      *
      * <p>Default is Deflater.DEFAULT_COMPRESSION.</p>
-     * @param level the compression level
+     * @param level the compression level.
+     * @throws IllegalArgumentException if an invalid compression level is specified.
      * @since 1.1
      */
     public void setLevel(int level) {
+        if (level < Deflater.DEFAULT_COMPRESSION
+            || level > Deflater.BEST_COMPRESSION) {
+            throw new IllegalArgumentException(
+                "Invalid compression level: " + level);
+        }
         hasCompressionLevelChanged = (this.level != level);
         this.level = level;
     }
@@ -843,7 +856,7 @@ public class ZipOutputStream extends FilterOutputStream {
      *
      * @since 1.14
      */
-    protected final void writeOut(byte [] data) throws IOException {
+    protected final void writeOut(byte[] data) throws IOException {
         writeOut(data, 0, data.length);
     }
 
@@ -856,7 +869,7 @@ public class ZipOutputStream extends FilterOutputStream {
      *
      * @since 1.14
      */
-    protected final void writeOut(byte [] data, int offset, int length)
+    protected final void writeOut(byte[] data, int offset, int length)
         throws IOException {
         if (raf != null) {
             raf.write(data, offset, length);
diff --git a/src/testcases/org/apache/tools/ant/taskdefs/ZipTest.java b/src/testcases/org/apache/tools/ant/taskdefs/ZipTest.java
index 0c9f1ac7d..57e4f4ed6 100644
--- a/src/testcases/org/apache/tools/ant/taskdefs/ZipTest.java
+++ b/src/testcases/org/apache/tools/ant/taskdefs/ZipTest.java
@@ -143,6 +143,9 @@ public class ZipTest extends BuildFileTest {
         executeTarget("zipEmptyCreate");
         assertTrue("archive should be created",
                    getProject().resolveFile("test3.zip").exists());
-
+    }
+    // Bugzilla Report 25513
+    public void testCompressionLevel() {
+        executeTarget("testCompressionLevel");
     }
 }