diff --git a/classpath/java/io/RandomAccessFile.java b/classpath/java/io/RandomAccessFile.java
index f411bbe748..c95b151e62 100644
--- a/classpath/java/io/RandomAccessFile.java
+++ b/classpath/java/io/RandomAccessFile.java
@@ -193,6 +193,10 @@ public class RandomAccessFile {
         seek(position);
         return this;
       }
+
+      public long size() throws IOException {
+        return length();
+      }
     };
   }
 }
diff --git a/classpath/java/nio/channels/FileChannel.java b/classpath/java/nio/channels/FileChannel.java
index e94641086a..30ccff32ba 100644
--- a/classpath/java/nio/channels/FileChannel.java
+++ b/classpath/java/nio/channels/FileChannel.java
@@ -30,4 +30,6 @@ public abstract class FileChannel implements Channel {
   public abstract long position() throws IOException;
 
   public abstract FileChannel position(long position) throws IOException;
+
+  public abstract long size() throws IOException;
 }