diff --git a/lib/java/src/protocol/TBinaryProtocol.java b/lib/java/src/protocol/TBinaryProtocol.java
index d90dece..4d6c345 100644
--- a/lib/java/src/protocol/TBinaryProtocol.java
+++ b/lib/java/src/protocol/TBinaryProtocol.java
@@ -95,6 +95,10 @@
     out.write(i64out, 0, 8);
   }
 
+  public void writeDouble(TTransport out, double dub) throws TException {
+    writeI64(out, Double.doubleToLongBits(dub));
+  }
+
   public void writeString(TTransport out, String str) throws TException {
     byte[] dat = str.getBytes();
     writeI32(out, dat.length);
@@ -203,6 +207,10 @@
       ((long)(i64rd[7] & 0xff));
   }
 
+  public double readDouble(TTransport in) throws TException {
+    return Double.longBitsToDouble(readI64(in));
+  }
+
   public String readString(TTransport in)  throws TException {
     int size = readI32(in);
     byte[] buf = new byte[size];
diff --git a/lib/java/src/protocol/TProtocol.java b/lib/java/src/protocol/TProtocol.java
index 69fe885..0831d12 100644
--- a/lib/java/src/protocol/TProtocol.java
+++ b/lib/java/src/protocol/TProtocol.java
@@ -61,6 +61,10 @@
   public void writeI64         (TTransport out,
                                 long       i64)     throws TException;
 
+  public void writeDouble      (TTransport out,
+                                double     dub)     throws TException;
+
+
   public void writeString      (TTransport out,
                                 String     str)     throws TException;
 
@@ -102,6 +106,8 @@
  
   public long     readI64          (TTransport in)  throws TException;
 
+  public double   readDouble       (TTransport in)  throws TException;
+
   public String   readString       (TTransport in)  throws TException;
 
 }
diff --git a/lib/java/src/protocol/TProtocolUtil.java b/lib/java/src/protocol/TProtocolUtil.java
index 5223639..1c88f8a 100644
--- a/lib/java/src/protocol/TProtocolUtil.java
+++ b/lib/java/src/protocol/TProtocolUtil.java
@@ -34,6 +34,10 @@
       {
         prot.readI64(in);
       }
+    case TType.DOUBLE:
+      {
+        prot.readDouble(in);
+      }
     case TType.STRING:
       {
         prot.readString(in);
diff --git a/lib/java/src/protocol/TType.java b/lib/java/src/protocol/TType.java
index 37b53bd..bed9a21 100644
--- a/lib/java/src/protocol/TType.java
+++ b/lib/java/src/protocol/TType.java
@@ -10,6 +10,7 @@
   public static final byte VOID   = 1;
   public static final byte BOOL   = 2;
   public static final byte BYTE   = 3;
+  public static final byte DOUBLE = 4;
   public static final byte I16    = 6;
   public static final byte I32    = 8;
   public static final byte I64    = 10;