diff --git a/libgo/go/net/http/fs_test.go b/libgo/go/net/http/fs_test.go
index 5aa93ce58373..ffba6a7bcb79 100644
--- a/libgo/go/net/http/fs_test.go
+++ b/libgo/go/net/http/fs_test.go
@@ -396,7 +396,7 @@ func TestLinuxSendfile(t *testing.T) {
 	defer ln.Close()
 
 	var buf bytes.Buffer
-	child := exec.Command("strace", "-f", os.Args[0], "-test.run=TestLinuxSendfileChild")
+	child := exec.Command("strace", "-f", "-e!sigaltstack", os.Args[0], "-test.run=TestLinuxSendfileChild")
 	child.ExtraFiles = append(child.ExtraFiles, lnf)
 	child.Env = append([]string{"GO_WANT_HELPER_PROCESS=1"}, os.Environ()...)
 	child.Stdout = &buf