diff --git a/lib/connection.js b/lib/connection.js
index 94a454b..4ac3426 100644
--- a/lib/connection.js
+++ b/lib/connection.js
@@ -44,6 +44,10 @@ module.exports = function Connection(opts) {
   var adaptor = module.adaptor(opts);
 
   for (var prop in adaptor) {
+    if (~['constructor'].indexOf(prop)) {
+      continue;
+    }
+
     if (typeof adaptor[prop] === 'function') {
       adaptor[prop] = adaptor[prop].bind(adaptor);
     }
diff --git a/lib/device.js b/lib/device.js
index 919080f..5f0a95e 100644
--- a/lib/device.js
+++ b/lib/device.js
@@ -44,6 +44,10 @@ module.exports = function Device(opts) {
   var driver = module.driver(opts);
 
   for (var prop in driver) {
+    if (~['constructor'].indexOf(prop)) {
+      continue;
+    }
+
     if (typeof driver[prop] === 'function') {
       driver[prop] = driver[prop].bind(driver);
     }