diff --git a/src/libsodium/crypto_pwhash/argon2/argon2-core.c b/src/libsodium/crypto_pwhash/argon2/argon2-core.c
index c4e4d842..2f1ebbfd 100644
--- a/src/libsodium/crypto_pwhash/argon2/argon2-core.c
+++ b/src/libsodium/crypto_pwhash/argon2/argon2-core.c
@@ -35,7 +35,11 @@
 # define MAP_ANON MAP_ANONYMOUS
 #endif
 #ifndef MAP_NOCORE
-# define MAP_NOCORE 0
+# ifdef MAP_CONCEAL
+#  define MAP_NOCORE MAP_CONCEAL
+# else
+#  define MAP_NOCORE 0
+# endif
 #endif
 #ifndef MAP_POPULATE
 # define MAP_POPULATE 0
diff --git a/src/libsodium/crypto_pwhash/scryptsalsa208sha256/scrypt_platform.c b/src/libsodium/crypto_pwhash/scryptsalsa208sha256/scrypt_platform.c
index cbd68aa1..a7d94107 100644
--- a/src/libsodium/crypto_pwhash/scryptsalsa208sha256/scrypt_platform.c
+++ b/src/libsodium/crypto_pwhash/scryptsalsa208sha256/scrypt_platform.c
@@ -31,7 +31,11 @@
 # define MAP_ANON MAP_ANONYMOUS
 #endif
 #ifndef MAP_NOCORE
-# define MAP_NOCORE 0
+# ifdef MAP_CONCEAL
+#  define MAP_NOCORE MAP_CONCEAL
+# else
+#  define MAP_NOCORE 0
+# endif
 #endif
 #ifndef MAP_POPULATE
 # define MAP_POPULATE 0
diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index 1fbd3a37..151dd09c 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -59,7 +59,11 @@ void *alloca (size_t);
 #define GARBAGE_VALUE 0xdb
 
 #ifndef MAP_NOCORE
-# define MAP_NOCORE 0
+# ifdef MAP_CONCEAL
+#  define MAP_NOCORE MAP_CONCEAL
+# else
+#  define MAP_NOCORE 0
+# endif
 #endif
 #if !defined(MAP_ANON) && defined(MAP_ANONYMOUS)
 # define MAP_ANON MAP_ANONYMOUS