diff -r -U1 ecl-13.5.1.orig/src/h/object.h ecl-13.5.1/src/h/object.h
--- ecl-13.5.1.orig/src/h/object.h	2013-05-28 03:37:36.000000000 +0700
+++ ecl-13.5.1/src/h/object.h	2013-05-29 19:23:34.000000000 +0700
@@ -25,4 +25,9 @@
 
+#ifndef TRUE
 #define	TRUE		1	/*  boolean true value  */
+#endif
+
+#ifndef FALSE
 #define	FALSE		0	/*  boolean false value  */
+#endif