diff --git a/newlib/libc/sys/rtems/include/sys/mman.h b/newlib/libc/sys/rtems/include/sys/mman.h
index 99c1eb8b3..6d861422d 100644
--- a/newlib/libc/sys/rtems/include/sys/mman.h
+++ b/newlib/libc/sys/rtems/include/sys/mman.h
@@ -179,7 +179,8 @@
 #define	MINCORE_MODIFIED	 0x4 /* Page has been modified by us */
 #define	MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
 #define	MINCORE_MODIFIED_OTHER	0x10 /* Page has been modified */
-#define	MINCORE_SUPER		0x20 /* Page is a "super" page */
+#define	MINCORE_SUPER		0x60 /* Page is a "super" page */
+#define	MINCORE_PSIND(i)	(((i) << 5) & MINCORE_SUPER) /* Page size */
 
 /*
  * Anonymous object constant for shm_open().