diff --git a/lib/index.js b/lib/index.js
index 82fb50b..9a352eb 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -428,7 +428,7 @@ class Pin extends Emitter {
 
     if (state.isPwm || state.isServo) {
       if (state.index === 15) {
-        state.pin._port.sock.write(new Buffer([Port.CMD.ANALOG_WRITE, value >> 8, value & 0xff]));
+        state.pin.port.sock.write(new Buffer([Port.CMD.ANALOG_WRITE, value >> 8, value & 0xff]));
       } else {
         state.pin.pwmDutyCycle(value);
       }
@@ -487,7 +487,7 @@ class Pin extends Emitter {
     if (state.isAnalogInput) {
       adcReadRequests.push({
         command: new Buffer([Port.CMD.ANALOG_READ, index]),
-        port: state.pin._port,
+        port: state.pin.port,
         size,
         callback,
       });
@@ -504,9 +504,9 @@ class Pin extends Emitter {
     }
 
     const poll = _ => {
-      state.pin._port.cork();
-      state.pin._port.sock.write(state.commands.read);
-      state.pin._port.enqueue({
+      state.pin.port.cork();
+      state.pin.port.sock.write(state.commands.read);
+      state.pin.port.enqueue({
         size,
         callback(error, data) {
           /* istanbul ignore if */
@@ -524,7 +524,7 @@ class Pin extends Emitter {
           data = null;
         },
       });
-      state.pin._port.uncork();
+      state.pin.port.uncork();
     };
 
     poll();