diff --git a/newlib/libc/sys/rtems/include/sys/mman.h b/newlib/libc/sys/rtems/include/sys/mman.h
index f0e01b696..53b656ceb 100644
--- a/newlib/libc/sys/rtems/include/sys/mman.h
+++ b/newlib/libc/sys/rtems/include/sys/mman.h
@@ -69,8 +69,8 @@
 #define	MAP_FIXED	 0x0010	/* map addr must be exactly as requested */
 
 #if __BSD_VISIBLE
-#define	MAP_RENAME	 0x0020	/* Sun: rename private pages to file */
-#define	MAP_NORESERVE	 0x0040	/* Sun: don't reserve needed swap area */
+#define	MAP_RESERVED0020 0x0020	/* previously unimplemented MAP_RENAME */
+#define	MAP_RESERVED0040 0x0040	/* previously unimplemented MAP_NORESERVE */
 #define	MAP_RESERVED0080 0x0080	/* previously misimplemented MAP_INHERIT */
 #define	MAP_RESERVED0100 0x0100	/* previously unimplemented MAP_NOEXTEND */
 #define	MAP_HASSEMAPHORE 0x0200	/* region may contain semaphores */