diff --git a/src/net/sockopt_bsd.go b/src/net/sockopt_bsd.go
index 216e5d52f12a41..ee1f98b834cf37 100644
--- a/src/net/sockopt_bsd.go
+++ b/src/net/sockopt_bsd.go
@@ -26,7 +26,7 @@ func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
 			syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_PORTRANGE, syscall.IPV6_PORTRANGE_HIGH)
 		}
 	}
-	if supportsIPv4map() && family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
+	if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW && supportsIPv4map() {
 		// Allow both IP versions even if the OS default
 		// is otherwise. Note that some operating systems
 		// never admit this option.