diff --git a/lib/libc/sys/sendfile.2 b/lib/libc/sys/sendfile.2
index 96979eed5a7..e2cac6a4a77 100644
--- a/lib/libc/sys/sendfile.2
+++ b/lib/libc/sys/sendfile.2
@@ -1,4 +1,4 @@
-.\" Copyright (c) 1998, David Greenman
+.\" Copyright (c) 2003, David G. Lawrence
 .\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -191,6 +191,10 @@ An error occurred while reading from
 .Fa fd .
 .It Bq Er EFAULT
 An invalid address was specified for an argument.
+.It Bq Er EINTR
+A signal interrupted sendfile before it could be completed. If specified, the number
+of bytes successfully sent will be returned in
+.Fa *sbytes .
 .It Bq Er EAGAIN
 The socket is marked for non-blocking I/O and not all data was sent due to the socket buffer being filled.
 If specified, the number of bytes successfully sent will be returned in
@@ -215,4 +219,4 @@ The
 .Fn sendfile
 system call
 and this manual page were written by
-.An David Greenman Aq dg@root.com .
+.An David G. Lawrence Aq dg@dglawrence.com .
diff --git a/sys/kern/uipc_syscalls.c b/sys/kern/uipc_syscalls.c
index 0e52d4b77ca..135ae1ddcfb 100644
--- a/sys/kern/uipc_syscalls.c
+++ b/sys/kern/uipc_syscalls.c
@@ -1994,6 +1994,11 @@ done:
 		vrele(vp);
 	if (so)
 		fputsock(so);
+
 	mtx_unlock(&Giant);
+
+	if (error == ERESTART)
+		error = EINTR;
+
 	return (error);
 }