diff --git a/src/net/ipsock.go b/src/net/ipsock.go
index 98d2dbffb7..c54b94da40 100644
--- a/src/net/ipsock.go
+++ b/src/net/ipsock.go
@@ -26,12 +26,6 @@ var (
 	supportsIPv4map bool
 )
 
-func init() {
-	sysInit()
-	supportsIPv4 = probeIPv4Stack()
-	supportsIPv6, supportsIPv4map = probeIPv6Stack()
-}
-
 // A netaddr represents a network endpoint address or a list of
 // network endpoint addresses.
 type netaddr interface {
diff --git a/src/net/net.go b/src/net/net.go
index 339c972906..3b06e6b489 100644
--- a/src/net/net.go
+++ b/src/net/net.go
@@ -46,6 +46,12 @@ import (
 	"time"
 )
 
+func init() {
+	sysInit()
+	supportsIPv4 = probeIPv4Stack()
+	supportsIPv6, supportsIPv4map = probeIPv6Stack()
+}
+
 // Addr represents a network end point address.
 type Addr interface {
 	Network() string // name of the network