diff --git a/src/net/netip/netip.go b/src/net/netip/netip.go
index e566a4861f..5c0c7afd97 100644
--- a/src/net/netip/netip.go
+++ b/src/net/netip/netip.go
@@ -756,11 +756,7 @@ func (ip Addr) String() string {
 		return ip.string4()
 	default:
 		if ip.Is4In6() {
-			if z := ip.Zone(); z != "" {
-				return "::ffff:" + ip.Unmap().string4() + "%" + z
-			} else {
-				return "::ffff:" + ip.Unmap().string4()
-			}
+			return ip.string4In6()
 		}
 		return ip.string6()
 	}
@@ -847,6 +843,13 @@ func (ip Addr) appendTo4(ret []byte) []byte {
 	return ret
 }
 
+func (ip Addr) string4In6() string {
+	const max = len("::ffff:255.255.255.255%enp5s0")
+	ret := make([]byte, 0, max)
+	ret = ip.appendTo4In6(ret)
+	return string(ret)
+}
+
 func (ip Addr) appendTo4In6(ret []byte) []byte {
 	ret = append(ret, "::ffff:"...)
 	ret = ip.Unmap().appendTo4(ret)
diff --git a/src/net/netip/netip_test.go b/src/net/netip/netip_test.go
index d80582139e..c914c5f256 100644
--- a/src/net/netip/netip_test.go
+++ b/src/net/netip/netip_test.go
@@ -1691,7 +1691,7 @@ func BenchmarkStdParseIP(b *testing.B) {
 	}
 }
 
-func BenchmarkIPString(b *testing.B) {
+func BenchmarkAddrString(b *testing.B) {
 	for _, test := range parseBenchInputs {
 		ip := MustParseAddr(test.ip)
 		b.Run(test.name, func(b *testing.B) {