===================================================================
RCS file: /home/cvs/OpenXM/src/ox_toolkit/configure,v
retrieving revision 1.10
retrieving revision 1.11
diff -u -p -r1.10 -r1.11
--- OpenXM/src/ox_toolkit/configure	2012/05/07 17:38:08	1.10
+++ OpenXM/src/ox_toolkit/configure	2015/07/02 02:57:30	1.11
@@ -11306,6 +11306,7 @@ ac_x_header_dirs='
 /usr/include/X11R5
 /usr/include/X11R4
 
+/opt/X11/include
 /usr/local/X11/include
 /usr/local/X11R7/include
 /usr/local/X11R6/include