diff -r bf56a85f3897 -r 6db178e18835 langtools/src/share/classes/com/sun/tools/sjavac/server/CompilerThread.java
--- a/langtools/src/share/classes/com/sun/tools/sjavac/server/CompilerThread.java	Wed May 15 06:53:01 2013 -0700
+++ b/langtools/src/share/classes/com/sun/tools/sjavac/server/CompilerThread.java	Wed May 15 10:39:26 2013 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -255,7 +255,8 @@
             }
             // Load visible sources
             Set<URI> visibleSources = new HashSet<URI>();
-            boolean fix_drive_letter_case = System.getProperty("os.name").toLowerCase().equals("windows");
+            boolean fix_drive_letter_case =
+                System.getProperty("os.name").toLowerCase().startsWith("windows");
             for (;;) {
                 String l = in.readLine();
                 if (l == null)