diff --git a/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/InputStreamReader.java b/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/InputStreamReader.java
index bb76cdce5f..d388621e4a 100644
--- a/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/InputStreamReader.java
+++ b/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/InputStreamReader.java
@@ -69,8 +69,7 @@ public class InputStreamReader extends Reader {
      * @param  in   An InputStream
      */
     public InputStreamReader(InputStream in) {
-        super(in);
-        sd = StreamDecoder.forInputStreamReader(in, this,
+        sd = StreamDecoder.forInputStreamReader(in, this.lock,
                 Charset.defaultCharset()); // ## check lock object
     }
 
@@ -90,10 +89,9 @@ public InputStreamReader(InputStream in) {
     public InputStreamReader(InputStream in, String charsetName)
         throws UnsupportedEncodingException
     {
-        super(in);
         if (charsetName == null)
             throw new NullPointerException("charsetName");
-        sd = StreamDecoder.forInputStreamReader(in, this, charsetName);
+        sd = StreamDecoder.forInputStreamReader(in, this.lock, charsetName);
     }
 
     /**
@@ -106,10 +104,9 @@ public InputStreamReader(InputStream in, String charsetName)
      * @spec JSR-51
      */
     public InputStreamReader(InputStream in, Charset cs) {
-        super(in);
         if (cs == null)
             throw new NullPointerException("charset");
-        sd = StreamDecoder.forInputStreamReader(in, this, cs);
+        sd = StreamDecoder.forInputStreamReader(in, this.lock, cs);
     }
 
     /**
@@ -122,10 +119,9 @@ public InputStreamReader(InputStream in, Charset cs) {
      * @spec JSR-51
      */
     public InputStreamReader(InputStream in, CharsetDecoder dec) {
-        super(in);
         if (dec == null)
             throw new NullPointerException("charset decoder");
-        sd = StreamDecoder.forInputStreamReader(in, this, dec);
+        sd = StreamDecoder.forInputStreamReader(in, this.lock, dec);
     }
 
     /**
diff --git a/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/OutputStreamWriter.java b/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/OutputStreamWriter.java
index 5f7b9e34bc..e88e81ac1d 100644
--- a/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/OutputStreamWriter.java
+++ b/jre_emul/android/platform/libcore/ojluni/src/main/java/java/io/OutputStreamWriter.java
@@ -97,7 +97,7 @@ public OutputStreamWriter(OutputStream out, String charsetName)
         super(out);
         if (charsetName == null)
             throw new NullPointerException("charsetName");
-        se = StreamEncoder.forOutputStreamWriter(out, this, charsetName);
+        se = StreamEncoder.forOutputStreamWriter(out, this.lock, charsetName);
     }
 
     /**
@@ -108,7 +108,7 @@ public OutputStreamWriter(OutputStream out, String charsetName)
     public OutputStreamWriter(OutputStream out) {
         super(out);
         try {
-            se = StreamEncoder.forOutputStreamWriter(out, this, (String)null);
+            se = StreamEncoder.forOutputStreamWriter(out, this.lock, (String)null);
         } catch (UnsupportedEncodingException e) {
             throw new Error(e);
         }
@@ -130,7 +130,7 @@ public OutputStreamWriter(OutputStream out, Charset cs) {
         super(out);
         if (cs == null)
             throw new NullPointerException("charset");
-        se = StreamEncoder.forOutputStreamWriter(out, this, cs);
+        se = StreamEncoder.forOutputStreamWriter(out, this.lock, cs);
     }
 
     /**
@@ -149,7 +149,7 @@ public OutputStreamWriter(OutputStream out, CharsetEncoder enc) {
         super(out);
         if (enc == null)
             throw new NullPointerException("charset encoder");
-        se = StreamEncoder.forOutputStreamWriter(out, this, enc);
+        se = StreamEncoder.forOutputStreamWriter(out, this.lock, enc);
     }
 
     /**
diff --git a/jre_emul/android/platform/libcore/ojluni/src/main/java/sun/nio/cs/StreamDecoder.java b/jre_emul/android/platform/libcore/ojluni/src/main/java/sun/nio/cs/StreamDecoder.java
index 0d469949ed..c9014539e1 100644
--- a/jre_emul/android/platform/libcore/ojluni/src/main/java/sun/nio/cs/StreamDecoder.java
+++ b/jre_emul/android/platform/libcore/ojluni/src/main/java/sun/nio/cs/StreamDecoder.java
@@ -233,14 +233,14 @@ private static FileChannel getChannel(FileInputStream in) {
     private InputStream in;
     private ReadableByteChannel ch;
 
-    StreamDecoder(InputStream in, Object lock, Charset cs) {
+  private StreamDecoder(InputStream in, Object lock, Charset cs) {
         this(in, lock,
          cs.newDecoder()
          .onMalformedInput(CodingErrorAction.REPLACE)
          .onUnmappableCharacter(CodingErrorAction.REPLACE));
     }
 
-    StreamDecoder(InputStream in, Object lock, CharsetDecoder dec) {
+  private StreamDecoder(InputStream in, Object lock, CharsetDecoder dec) {
         super(lock);
         this.cs = dec.charset();
         this.decoder = dec;
@@ -260,7 +260,7 @@ private static FileChannel getChannel(FileInputStream in) {
         bb.flip();                      // So that bb is initially empty
     }
 
-    StreamDecoder(ReadableByteChannel ch, CharsetDecoder dec, int mbc) {
+  private StreamDecoder(ReadableByteChannel ch, CharsetDecoder dec, int mbc) {
         this.in = null;
         this.ch = ch;
         this.decoder = dec;