diff --git a/common/fltk/mac_endianness.h b/common/fltk/mac_endianness.h
new file mode 100644
index 0000000..c4c2aa6
--- /dev/null
+++ b/common/fltk/mac_endianness.h
@@ -0,0 +1,38 @@
+/*
+ * "$Id: mac_endianness.h 8511 2011-03-06 16:54:58Z manolo $"
+ *
+ * Mac-specific configuration file for the Fast Light Tool Kit (FLTK).
+ *
+ * Copyright 1998-2011 by Bill Spitzak and others.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA.
+ *
+ * Please report all bugs and problems on the following page:
+ *
+ *     http://www.fltk.org/str.php
+ */
+ 
+#ifdef __APPLE__
+#  ifdef __BIG_ENDIAN__
+#    define WORDS_BIGENDIAN 1
+#  else
+#    define WORDS_BIGENDIAN 0
+#  endif
+#endif
+
+/*
+ * End of "$Id: mac_endianness.h 8511 2011-03-06 16:54:58Z manolo $".
+ */