diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 526717f85..6ac584ae5 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,11 @@
+2014-01-17  Sebastian Huber  <sebastian.huber@embedded-brains.de>
+
+	* libc/include/sys/_default_fcntl.h (LOCK_SH): Define.
+	(LOCK_EX): Likewise.
+	(LOCK_NB): Likewise.
+	(LOCK_UN): Likewise.
+	(flock): Declare.
+
 2014-01-17  Corinna Vinschen  <vinschen@redhat.com>
 
 	Introduce _STDIO_BSD_SEMANTICS flag to switch fclose/exit file flushing
diff --git a/newlib/libc/include/sys/_default_fcntl.h b/newlib/libc/include/sys/_default_fcntl.h
index 40d8fae17..b70e71e1e 100644
--- a/newlib/libc/include/sys/_default_fcntl.h
+++ b/newlib/libc/include/sys/_default_fcntl.h
@@ -148,6 +148,14 @@ extern "C" {
 #define AT_REMOVEDIR            8
 #endif
 
+#if __BSD_VISIBLE
+/* lock operations for flock(2) */
+#define	LOCK_SH		0x01		/* shared file lock */
+#define	LOCK_EX		0x02		/* exclusive file lock */
+#define	LOCK_NB		0x04		/* don't block when locking */
+#define	LOCK_UN		0x08		/* unlock file */
+#endif
+
 /*#include <sys/stdtypes.h>*/
 
 #ifndef __CYGWIN__
@@ -176,7 +184,6 @@ struct eflock {
 };
 #endif	/* !_POSIX_SOURCE */
 
-
 #include <sys/types.h>
 #include <sys/stat.h>		/* sigh. for the mode bits for open/creat */
 
@@ -186,6 +193,9 @@ extern int openat _PARAMS ((int, const char *, int, ...));
 #endif
 extern int creat _PARAMS ((const char *, mode_t));
 extern int fcntl _PARAMS ((int, int, ...));
+#if __BSD_VISIBLE
+extern int flock _PARAMS ((int, int));
+#endif
 #ifdef __CYGWIN__
 #include <sys/time.h>
 extern int futimesat _PARAMS ((int, const char *, const struct timeval *));