diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index 62ac252d48fe..2ceb3d4199d4 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -1036,6 +1036,7 @@ linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
 
 	switch (args->cmd) {
 	case LINUX_F_GETLK:
+	case LINUX_F_GETLK64:
 		error = copyin((caddr_t)args->arg, &linux_flock,
 		    sizeof(linux_flock));
 		if (error)
@@ -1052,6 +1053,7 @@ linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
 		    sizeof(linux_flock)));
 
 	case LINUX_F_SETLK:
+	case LINUX_F_SETLK64:
 		error = copyin((caddr_t)args->arg, &linux_flock,
 		    sizeof(linux_flock));
 		if (error)
@@ -1063,6 +1065,7 @@ linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
 		return (fcntl(td, &fcntl_args));
 
 	case LINUX_F_SETLKW:
+	case LINUX_F_SETLKW64:
 		error = copyin((caddr_t)args->arg, &linux_flock,
 		    sizeof(linux_flock));
 		if (error)
diff --git a/sys/i386/linux/linux.h b/sys/i386/linux/linux.h
index ac7f020780d9..c968bbf619f0 100644
--- a/sys/i386/linux/linux.h
+++ b/sys/i386/linux/linux.h
@@ -492,6 +492,10 @@ int	linux_ioctl_unregister_handler(struct linux_ioctl_handler *h);
 #define	LINUX_F_SETOWN		8
 #define	LINUX_F_GETOWN		9
 
+#define	LINUX_F_GETLK64		12
+#define	LINUX_F_SETLK64		13
+#define	LINUX_F_SETLKW64	14
+
 #define	LINUX_F_RDLCK		0
 #define	LINUX_F_WRLCK		1
 #define	LINUX_F_UNLCK		2