diff --git a/libc/include/sys/sendfile.h b/libc/include/sys/sendfile.h
index d5aba26..81a3c44 100644
--- a/libc/include/sys/sendfile.h
+++ b/libc/include/sys/sendfile.h
@@ -25,6 +25,7 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+
 #ifndef _SYS_SENDFILE_H_
 #define _SYS_SENDFILE_H_
 
@@ -33,7 +34,8 @@
 
 __BEGIN_DECLS
 
-extern ssize_t sendfile(int out_fd, int in_fd, off_t *offset, size_t count);
+extern ssize_t sendfile(int out_fd, int in_fd, off_t* offset, size_t count);
+extern ssize_t sendfile64(int out_fd, int in_fd, off64_t* offset, size_t count);
 
 __END_DECLS
 
diff --git a/libc/include/sys/types.h b/libc/include/sys/types.h
index a0ce405..8b7fea8 100644
--- a/libc/include/sys/types.h
+++ b/libc/include/sys/types.h
@@ -65,7 +65,7 @@
 typedef __kernel_off_t       off_t;
 #endif
 typedef __kernel_loff_t      loff_t;
-typedef loff_t               off64_t;  /* GLibc-specific */
+typedef loff_t               off64_t;
 
 typedef __kernel_pid_t		 pid_t;