diff --git a/include/sys/mman.h b/include/sys/mman.h
index 302ad134002d20ee6d1f3d068808bc3fc9458f92..19dd844e7eb4c2dc1e7515795a8adb93becc4b56 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -35,6 +35,7 @@ extern "C" {
 #define MAP_STACK      0x20000
 #define MAP_HUGETLB    0x40000
 #define MAP_SYNC       0x80000
+#define MAP_FIXED_NOREPLACE 0x100000
 #define MAP_FILE       0
 
 #define MAP_HUGE_SHIFT 26