Index: b/usr/src/uts/common/sys/types.h
===================================================================
--- a/usr/src/uts/common/sys/types.h	2014-03-01 22:56:00.259198451 +0400
+++ b/usr/src/uts/common/sys/types.h	2014-03-01 22:56:13.834286748 +0400
@@ -191,15 +191,17 @@
 typedef	long		blksize_t;	/* used for block sizes */
 #endif
 
-#if defined(__XOPEN_OR_POSIX)
-typedef enum { _B_FALSE, _B_TRUE } boolean_t;
-#else
+#ifndef BOOLEAN_T_DEFINED
+#define BOOLEAN_T_DEFINED
+#define _B_TRUE B_TRUE
+#define _B_FALSE B_FALSE
 typedef enum { B_FALSE, B_TRUE } boolean_t;
+#endif
+
 #ifdef _KERNEL
 #define	VALID_BOOLEAN(x)	(((x) == B_FALSE) || ((x) == B_TRUE))
 #define	VOID2BOOLEAN(x)		(((uintptr_t)(x) == 0) ? B_FALSE : B_TRUE)
 #endif /* _KERNEL */
-#endif /* defined(__XOPEN_OR_POSIX) */
 
 #ifdef _KERNEL
 #define	BOOLEAN2VOID(x)		((x) ? 1 : 0)