diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/io/TimeoutInputStreamTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/io/TimeoutInputStreamTest.java
index 648416925..76bda6a35 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/io/TimeoutInputStreamTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/io/TimeoutInputStreamTest.java
@@ -91,7 +91,7 @@ public void testTimeout_readBuffer_Success1() throws IOException {
 		final byte[] exp = new byte[] { 'a', 'b', 'c' };
 		final byte[] act = new byte[exp.length];
 		out.write(exp);
-		IO.readFully(is, act, 0, act.length);
+		IO.readFully(is, act);
 		assertArrayEquals(exp, act);
 	}
 
@@ -110,7 +110,7 @@ public void testTimeout_readBuffer_Success2() throws IOException {
 	public void testTimeout_readBuffer_Timeout() throws IOException {
 		beginRead();
 		try {
-			IO.readFully(is, new byte[512], 0, 512);
+			IO.readFully(is, new byte[512]);
 			fail("incorrectly read bytes");
 		} catch (InterruptedIOException e) {
 			// expected
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/util/IO.java b/org.eclipse.jgit/src/org/eclipse/jgit/util/IO.java
index 6d5694e43..80877bbdc 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/util/IO.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/util/IO.java
@@ -206,6 +206,25 @@ public static void readFully(final InputStream fd, final byte[] dst,
 		}
 	}
 
+	/**
+	 * Read from input until the entire byte array filled, or throw an exception
+	 * if stream ends first.
+	 *
+	 * @param fd
+	 *            input stream to read the data from.
+	 * @param dst
+	 *            buffer that must be fully populated
+	 * @throws EOFException
+	 *             the stream ended before dst was fully populated.
+	 * @throws java.io.IOException
+	 *             there was an error reading from the stream.
+	 * @since 6.5
+	 */
+	public static void readFully(InputStream fd, byte[] dst)
+			throws IOException {
+		readFully(fd, dst, 0, dst.length);
+	}
+
 	/**
 	 * Read as much of the array as possible from a channel.
 	 *