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-rw-r--r--bits/mman-linux.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/bits/mman-linux.h b/bits/mman-linux.h
index dbb994bf4d..29986d3cd2 100644
--- a/bits/mman-linux.h
+++ b/bits/mman-linux.h
@@ -81,6 +81,7 @@
 # define MADV_SEQUENTIAL  2	/* Expect sequential page references.  */
 # define MADV_WILLNEED	  3	/* Will need these pages.  */
 # define MADV_DONTNEED	  4	/* Don't need these pages.  */
+# define MADV_FREE	  8	/* Free pages only if memory pressure.  */
 # define MADV_REMOVE	  9	/* Remove these pages and resources.  */
 # define MADV_DONTFORK	  10	/* Do not inherit across fork.  */
 # define MADV_DOFORK	  11	/* Do inherit across fork.  */