diff --git a/libgo/go/syscall/libcall_linux.go b/libgo/go/syscall/libcall_linux.go
index 93137fc7fb72..3b434e3fff63 100644
--- a/libgo/go/syscall/libcall_linux.go
+++ b/libgo/go/syscall/libcall_linux.go
@@ -327,6 +327,7 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 	var soff Offset_t
 	var psoff *Offset_t
 	if offset != nil {
+		soff = Offset_t(*offset)
 		psoff = &soff
 	}
 	written, err = sendfile(outfd, infd, psoff, count)