diff --git a/WHATSNEW b/WHATSNEW
index eb78fbff8..f3f61411f 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -232,6 +232,10 @@ Other changes:
  * <javah> now supports the GNU project's gcjh compiler.
    Bugzilla Report 50149.
 
+ * <checksum> supports additional views of a file's path as elements
+   for a custom pattern.
+   Bugzilla Report 50114.
+
 Changes from Ant 1.8.0 TO Ant 1.8.1 
 ===================================
 
diff --git a/docs/manual/Tasks/checksum.html b/docs/manual/Tasks/checksum.html
index d9e6e54e0..2ca9928cc 100644
--- a/docs/manual/Tasks/checksum.html
+++ b/docs/manual/Tasks/checksum.html
@@ -113,10 +113,16 @@ or set the <tt>fileext</tt> attribute.
   <tr>
     <td valign="top">pattern</td>
     <td valign="top">Specifies the pattern to use as a pattern
-    suitable for <a
-    href="http://download.oracle.com/javase/6/docs/api/java/text/MessageFormat.html">MessageFormat</a>
+    suitable
+    for <a href="http://download.oracle.com/javase/6/docs/api/java/text/MessageFormat.html">MessageFormat</a>
     where <code>{0}</code> is replaced with the checksum and
-      <code>{1}</code> with the file name. <em>Since Ant 1.7.0</em></td>
+      <code>{1}</code> with the file name. <em>Since Ant
+      1.7.0</em><br/>
+      <em>starting with Ant 1.8.2</em> <code>{2}</code> is replaced by
+      the path of the file relative to the checksum file being
+      written, <code>{3}</code> with tha path of the file relative to
+      the project's basedir and <code>{4}</code> with the absolute
+      path of the file.</td>
     <td valign="top" align="center">No - default is &quot;{0}&quot;.</td>
   </tr>
   <tr>
diff --git a/src/main/org/apache/tools/ant/taskdefs/Checksum.java b/src/main/org/apache/tools/ant/taskdefs/Checksum.java
index 5bc6aca68..523005a9c 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Checksum.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Checksum.java
@@ -61,6 +61,7 @@ import org.apache.tools.ant.util.StringUtils;
  */
 public class Checksum extends MatchingTask implements Condition {
 
+    private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
     private static final int NIBBLE = 4;
     private static final int WORD = 16;
     private static final int BUFFER_SIZE = 8 * 1024;
@@ -531,6 +532,15 @@ public class Checksum extends MatchingTask implements Condition {
                         fos.write(format.format(new Object[] {
                                                     checksum,
                                                     src.getName(),
+                                                    FILE_UTILS
+                                                    .getRelativePath(dest
+                                                                     .getParentFile(),
+                                                                     src),
+                                                    FILE_UTILS
+                                                    .getRelativePath(getProject()
+                                                                     .getBaseDir(),
+                                                                     src),
+                                                    src.getAbsolutePath()
                                                 }).getBytes());
                         fos.write(StringUtils.LINE_SEP.getBytes());
                         fos.close();
diff --git a/src/tests/antunit/taskdefs/checksum-test.xml b/src/tests/antunit/taskdefs/checksum-test.xml
index 022a6dbcf..8341f4253 100644
--- a/src/tests/antunit/taskdefs/checksum-test.xml
+++ b/src/tests/antunit/taskdefs/checksum-test.xml
@@ -45,4 +45,39 @@
                              value="f4d688789d32e6ca6bc93c504dbc6b46"/>
   </target>
 
+  <target name="testChecksumPattern2">
+    <mkdir dir="${output}"/>
+    <mkdir dir="${input}"/>
+    <echo file="${input}/a.txt">abc</echo>
+    <checksum todir="${output}" pattern="{2}">
+      <fileset dir="${input}"/>
+    </checksum>
+    <au:assertResourceContains
+        resource="${output}/a.txt.MD5"
+        value="../testinput/a.txt"/>
+  </target>
+
+  <target name="testChecksumPattern3">
+    <mkdir dir="${output}"/>
+    <checksum todir="${output}" pattern="{3}">
+      <fileset dir=".." includes="types/fileset-test.xml"/>
+    </checksum>
+    <au:assertResourceContains
+        resource="${output}/types/fileset-test.xml.MD5"
+        value="../types/fileset-test.xml"/>
+  </target>
+
+  <target name="testChecksumPattern4">
+    <mkdir dir="${output}"/>
+    <mkdir dir="${input}"/>
+    <property name="a" location="${input}/a.txt"/>
+    <echo file="${a}">abc</echo>
+    <checksum todir="${output}" pattern="{4}">
+      <fileset dir="${input}"/>
+    </checksum>
+    <au:assertResourceContains
+        resource="${output}/a.txt.MD5"
+        value="${a}"/>
+  </target>
+
 </project>