diff --git a/lib/xcore.js b/lib/xcore.js
index 519c665..cf073e4 100644
--- a/lib/xcore.js
+++ b/lib/xcore.js
@@ -39,7 +39,8 @@ XClient.prototype.init = function(stream)
     this.stream = stream;
 
     this.authHost = stream.remoteAddress;
-    this.authFamily = stream.remoteFamily;
+    // Node v0.10.x does not have stream.remoteFamily, so dig in to find it
+    this.authFamily = stream._getpeername ? stream._getpeername().family : stream.remoteFamily;
     if (!this.authHost || this.authHost === '127.0.0.1' || this.authHost === '::1') {
       this.authHost = os.hostname();
       this.authFamily = null;