diff --git a/arch/i386/bits/fcntl.h b/arch/i386/bits/fcntl.h
index fdc78736e3d78c039ce55e8b44c39ef0831695fe..33a5185ce0c1def0a30286143ec47813d1cbcd28 100644
--- a/arch/i386/bits/fcntl.h
+++ b/arch/i386/bits/fcntl.h
@@ -4,26 +4,18 @@
 #define O_TRUNC       01000
 #define O_APPEND      02000
 #define O_NONBLOCK    04000
-#define O_SYNC       010000
+#define O_DSYNC      010000
+#define O_SYNC     04010000
+#define O_RSYNC    04010000
 #define O_DIRECTORY 0200000
 #define O_NOFOLLOW  0400000
 #define O_CLOEXEC  02000000
 
-/* Extensions, but in the reserved namespace, so OK */
 #define O_ASYNC      020000
 #define O_DIRECT     040000
 #define O_LARGEFILE 0100000
 #define O_NOATIME  01000000
 #define O_NDELAY O_NONBLOCK
-#define F_DUPFD_CLOEXEC 1030
-
-#ifdef _GNU_SOURCE
-#define FAPPEND O_APPEND
-#define FFSYNC O_FSYNC
-#define FASYNC O_ASYNC
-#define FNONBLOCK O_NONBLOCK
-#define FNDELAY O_NDELAY
-#endif
 
 #define F_DUPFD  0
 #define F_GETFD  1
@@ -37,3 +29,5 @@
 #define F_GETLK 12
 #define F_SETLK 13
 #define F_SETLKW 14
+
+#define F_DUPFD_CLOEXEC 1030
diff --git a/arch/x86_64/bits/fcntl.h b/arch/x86_64/bits/fcntl.h
index 3a26ce9e85b5667d0543a793695fe54f19454a74..f3e995026c72caa9f68905ecd3a922dac0ecd9a1 100644
--- a/arch/x86_64/bits/fcntl.h
+++ b/arch/x86_64/bits/fcntl.h
@@ -4,26 +4,18 @@
 #define O_TRUNC       01000
 #define O_APPEND      02000
 #define O_NONBLOCK    04000
-#define O_SYNC       010000
+#define O_DSYNC      010000
+#define O_SYNC     04010000
+#define O_RSYNC    04010000
 #define O_DIRECTORY 0200000
 #define O_NOFOLLOW  0400000
 #define O_CLOEXEC  02000000
 
-/* Extensions, but in the reserved namespace, so OK */
 #define O_ASYNC      020000
 #define O_DIRECT     040000
 #define O_LARGEFILE       0
 #define O_NOATIME  01000000
 #define O_NDELAY O_NONBLOCK
-#define F_DUPFD_CLOEXEC 1030
-
-#ifdef _GNU_SOURCE
-#define FAPPEND O_APPEND
-#define FFSYNC O_FSYNC
-#define FASYNC O_ASYNC
-#define FNONBLOCK O_NONBLOCK
-#define FNDELAY O_NDELAY
-#endif
 
 #define F_DUPFD  0
 #define F_GETFD  1
@@ -37,3 +29,5 @@
 #define F_GETLK 5
 #define F_SETLK 6
 #define F_SETLKW 7
+
+#define F_DUPFD_CLOEXEC 1030
diff --git a/include/fcntl.h b/include/fcntl.h
index 6faf9cda2d1bfc90e343be716b2c251557f04f17..1c18c6e2251db1cea2b48316e5e3759de25cad41 100644
--- a/include/fcntl.h
+++ b/include/fcntl.h
@@ -78,6 +78,14 @@ int posix_fallocate(int, off_t, off_t);
 #define S_IRWXO 0007
 #endif
 
+#ifdef _GNU_SOURCE
+#define FAPPEND O_APPEND
+#define FFSYNC O_FSYNC
+#define FASYNC O_ASYNC
+#define FNONBLOCK O_NONBLOCK
+#define FNDELAY O_NDELAY
+#endif
+
 #ifdef __cplusplus
 }
 #endif