diff --git a/lib/primitives/netaddress.js b/lib/primitives/netaddress.js
index 971308d9..a47200a4 100644
--- a/lib/primitives/netaddress.js
+++ b/lib/primitives/netaddress.js
@@ -120,7 +120,7 @@ NetAddress.isIPv4 = function isIPv4() {
  */
 
 NetAddress.isIPv6 = function isIPv6() {
-  return !IP.isIPv6(this.raw);
+  return IP.isIPv6(this.raw);
 };
 
 /**