Index: src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_386.go
--- src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_386.go.orig	2017-08-16 09:17:21.000000000 +0200
+++ src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_386.go	2017-08-16 09:41:53.336036000 +0200
@@ -1112,6 +1112,7 @@
 	O_CREAT                           = 0x200
 	O_DIRECT                          = 0x10000
 	O_DIRECTORY                       = 0x20000
+	O_DSYNC                           = 0x0
 	O_EXCL                            = 0x800
 	O_EXEC                            = 0x40000
 	O_EXLOCK                          = 0x20
Index: src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_amd64.go
--- src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_amd64.go.orig	2017-08-16 09:17:21.000000000 +0200
+++ src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_amd64.go	2017-08-16 09:41:41.865879000 +0200
@@ -1117,6 +1117,7 @@
 	O_CREAT                           = 0x200
 	O_DIRECT                          = 0x10000
 	O_DIRECTORY                       = 0x20000
+	O_DSYNC                           = 0x0
 	O_EXCL                            = 0x800
 	O_EXEC                            = 0x40000
 	O_EXLOCK                          = 0x20
Index: src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_arm.go
--- src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_arm.go.orig	2017-08-16 09:17:21.000000000 +0200
+++ src/github.com/dgraph-io/dgraph/vendor/golang.org/x/sys/unix/zerrors_freebsd_arm.go	2017-08-16 09:42:06.228129000 +0200
@@ -1098,6 +1098,7 @@
 	O_CREAT                           = 0x200
 	O_DIRECT                          = 0x10000
 	O_DIRECTORY                       = 0x20000
+	O_DSYNC                           = 0x0
 	O_EXCL                            = 0x800
 	O_EXEC                            = 0x40000
 	O_EXLOCK                          = 0x20