--- mozilla-release.orig/extensions/spellcheck/hunspell/src/hunspell_alloc_hooks.h	2013-09-11 01:15:00.000000000 +0200
+++ mozilla-release/extensions/spellcheck/hunspell/src/hunspell_alloc_hooks.h	2013-10-24 11:28:30.000000000 +0200
@@ -33,6 +33,8 @@
 
 #ifndef alloc_hooks_h__
 #define alloc_hooks_h__
+/* prevent free/calloc from sched.h to be included */
+#undef _GNU_SOURCE
 
 /**
  * This file is force-included in hunspell code.  Its purpose is to add memory
