Index: vutils.py
===================================================================
--- vutils.py	(revision 16)
+++ vutils.py	(working copy)
@@ -231,7 +231,7 @@
     """    
     fhandle = open(filename, 'rb')
     buffer = fhandle.read(4)
-    if (buffer == "hibr"):
+    if (buffer == "hibr" or buffer == "wake"):
         return True
     return False