diff --git a/libc/sysv/consts/madv.h b/libc/sysv/consts/madv.h
index 613645db5..5fb36d05c 100644
--- a/libc/sysv/consts/madv.h
+++ b/libc/sysv/consts/madv.h
@@ -33,5 +33,27 @@ extern const unsigned MADV_COLLAPSE;
 #define MADV_SEQUENTIAL 2
 #define MADV_WILLNEED   3
 
+#define MADV_DODUMP          MADV_DODUMP
+#define MADV_DOFORK          MADV_DOFORK
+#define MADV_DONTDUMP        MADV_DONTDUMP
+#define MADV_DONTFORK        MADV_DONTFORK
+#define MADV_DONTNEED        MADV_DONTNEED
+#define MADV_FREE            MADV_FREE
+#define MADV_HUGEPAGE        MADV_HUGEPAGE
+#define MADV_HWPOISON        MADV_HWPOISON
+#define MADV_MERGEABLE       MADV_MERGEABLE
+#define MADV_NOHUGEPAGE      MADV_NOHUGEPAGE
+#define MADV_REMOVE          MADV_REMOVE
+#define MADV_UNMERGEABLE     MADV_UNMERGEABLE
+#define MADV_SOFT_OFFLINE    MADV_SOFT_OFFLINE
+#define MADV_WIPEONFORK      MADV_WIPEONFORK
+#define MADV_KEEPONFORK      MADV_KEEPONFORK
+#define MADV_COLD            MADV_COLD
+#define MADV_PAGEOUT         MADV_PAGEOUT
+#define MADV_POPULATE_READ   MADV_POPULATE_READ
+#define MADV_POPULATE_WRITE  MADV_POPULATE_WRITE
+#define MADV_DONTNEED_LOCKED MADV_DONTNEED_LOCKED
+#define MADV_COLLAPSE        MADV_COLLAPSE
+
 COSMOPOLITAN_C_END_
 #endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_MADV_H_ */