diff --git a/libnetwork/network.go b/libnetwork/network.go
index 42040bf803..3b0639553b 100644
--- a/libnetwork/network.go
+++ b/libnetwork/network.go
@@ -698,10 +698,6 @@ func (n *Network) UnmarshalJSON(b []byte) (err error) {
 	if v, ok := netMap["loadBalancerMode"]; ok {
 		n.loadBalancerMode = v.(string)
 	}
-	// Reconcile old networks with the recently added `--ipv6` flag
-	if !n.enableIPv6 {
-		n.enableIPv6 = len(n.ipamV6Info) > 0
-	}
 	return nil
 }