--- webkit-1.6.1/Source/JavaScriptCore/wtf/gobject/GTypedefs.h~    2011-09-26 14:54:57.000000000 -0600
+++ webkit-1.6.1/Source/JavaScriptCore/wtf/gobject/GTypedefs.h    2011-11-20 06:30:29.608190397 -0700
@@ -52,7 +52,7 @@
 typedef struct _GHashTable GHashTable;
 typedef struct _GInputStream GInputStream;
 typedef struct _GList GList;
-typedef struct _GMutex GMutex;
+typedef union  _GMutex GMutex;
 typedef struct _GPatternSpec GPatternSpec;
 typedef struct _GPollableOutputStream GPollableOutputStream;
 typedef struct _GSocketClient GSocketClient;