diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 7a50c49dd6..d251f94267 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -4,10 +4,6 @@ Trunk (unreleased changes)
 
   INCOMPATIBLE CHANGES
    
-   HADOOP-7542. Change Configuration XML format to 1.1 to add support for
-                serializing additional characters. This requires XML1.1
-                support in the XML parser (Christopher Egner via harsh)
-
   IMPROVEMENTS
 
     HADOOP-7595. Upgrade dependency to Avro 1.5.3. (Alejandro Abdelnur via atm)
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
index c310aa65e6..4fb1d19066 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
@@ -1632,10 +1632,6 @@ private synchronized Document asXmlDocument() throws IOException {
     try {
       doc =
         DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
-
-      // Allow a broader set of control characters to appear in job confs.
-      // cf https://issues.apache.org/jira/browse/MAPREDUCE-109 
-      doc.setXmlVersion( "1.1" );
     } catch (ParserConfigurationException pe) {
       throw new IOException(pe);
     }
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfiguration.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfiguration.java
index 5842db199d..f9f14fb848 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfiguration.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfiguration.java
@@ -58,7 +58,7 @@ protected void tearDown() throws Exception {
   }
   
   private void startConfig() throws IOException{
-    out.write("<?xml version=\"1.1\"?>\n");
+    out.write("<?xml version=\"1.0\"?>\n");
     out.write("<configuration>\n");
   }
 
@@ -221,18 +221,6 @@ public void testCommentsInValue() throws IOException {
     assertEquals("this  contains a comment", conf.get("my.comment"));
   }
   
-  public void testControlAInValue() throws IOException {
-    out = new BufferedWriter(new FileWriter(CONFIG));
-    startConfig();
-    appendProperty("my.char", "&#1;");
-    appendProperty("my.string", "some&#1;string");
-    endConfig();
-    Path fileResource = new Path(CONFIG);
-    conf.addResource(fileResource);
-    assertEquals("\u0001", conf.get("my.char"));
-    assertEquals("some\u0001string", conf.get("my.string"));
-  }
-
   public void testTrim() throws IOException {
     out=new BufferedWriter(new FileWriter(CONFIG));
     startConfig();
@@ -310,7 +298,7 @@ public void testWriteXml() throws IOException {
     conf.writeXml(baos);
     String result = baos.toString();
     assertTrue("Result has proper header", result.startsWith(
-        "<?xml version=\"1.1\" encoding=\"UTF-8\" standalone=\"no\"?><configuration>"));
+        "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><configuration>"));
     assertTrue("Result has proper footer", result.endsWith("</configuration>"));
   }