diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CdcAcmSerialDriver.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CdcAcmSerialDriver.java
index dc3ce29..ad9f233 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CdcAcmSerialDriver.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CdcAcmSerialDriver.java
@@ -8,7 +8,6 @@ package com.hoho.android.usbserial.driver;
 
 import android.hardware.usb.UsbConstants;
 import android.hardware.usb.UsbDevice;
-import android.hardware.usb.UsbDeviceConnection;
 import android.hardware.usb.UsbEndpoint;
 import android.hardware.usb.UsbInterface;
 import android.util.Log;
@@ -95,7 +94,7 @@ public class CdcAcmSerialDriver implements UsbSerialDriver {
         }
 
         @Override
-        protected void openInt(UsbDeviceConnection connection) throws IOException {
+        protected void openInt() throws IOException {
             if (mPortNumber == -1) {
                 Log.d(TAG,"device might be castrated ACM device, trying single interface logic");
                 openSingleInterface();
diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Ch34xSerialDriver.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Ch34xSerialDriver.java
index cb34533..00fa8a1 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Ch34xSerialDriver.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Ch34xSerialDriver.java
@@ -7,7 +7,6 @@ package com.hoho.android.usbserial.driver;
 
 import android.hardware.usb.UsbConstants;
 import android.hardware.usb.UsbDevice;
-import android.hardware.usb.UsbDeviceConnection;
 import android.hardware.usb.UsbEndpoint;
 import android.hardware.usb.UsbInterface;
 import android.util.Log;
@@ -80,7 +79,7 @@ public class Ch34xSerialDriver implements UsbSerialDriver {
 		}
 
 		@Override
-		protected void openInt(UsbDeviceConnection connection) throws IOException {
+		protected void openInt() throws IOException {
 			for (int i = 0; i < mDevice.getInterfaceCount(); i++) {
 				UsbInterface usbIface = mDevice.getInterface(i);
 				if (!mConnection.claimInterface(usbIface, true)) {
diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java
index 991a637..578656c 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java
@@ -118,7 +118,7 @@ public abstract class CommonUsbSerialPort implements UsbSerialPort {
         }
         mConnection = connection;
         try {
-            openInt(connection);
+            openInt();
             if (mReadEndpoint == null || mWriteEndpoint == null) {
                 throw new IOException("Could not get read & write endpoints");
             }
@@ -132,7 +132,7 @@ public abstract class CommonUsbSerialPort implements UsbSerialPort {
         }
     }
 
-    protected abstract void openInt(UsbDeviceConnection connection) throws IOException;
+    protected abstract void openInt() throws IOException;
 
     @Override
     public void close() throws IOException {
diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Cp21xxSerialDriver.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Cp21xxSerialDriver.java
index 189112c..883c7ed 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Cp21xxSerialDriver.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/Cp21xxSerialDriver.java
@@ -8,7 +8,6 @@ package com.hoho.android.usbserial.driver;
 
 import android.hardware.usb.UsbConstants;
 import android.hardware.usb.UsbDevice;
-import android.hardware.usb.UsbDeviceConnection;
 import android.hardware.usb.UsbEndpoint;
 import android.hardware.usb.UsbInterface;
 
@@ -126,7 +125,7 @@ public class Cp21xxSerialDriver implements UsbSerialDriver {
         }
 
         @Override
-        protected void openInt(UsbDeviceConnection connection) throws IOException {
+        protected void openInt() throws IOException {
             mIsRestrictedPort = mDevice.getInterfaceCount() == 2 && mPortNumber == 1;
             if(mPortNumber >= mDevice.getInterfaceCount()) {
                 throw new IOException("Unknown port number");
diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/FtdiSerialDriver.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/FtdiSerialDriver.java
index 5f88d32..f34ba90 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/FtdiSerialDriver.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/FtdiSerialDriver.java
@@ -9,7 +9,6 @@ package com.hoho.android.usbserial.driver;
 
 import android.hardware.usb.UsbConstants;
 import android.hardware.usb.UsbDevice;
-import android.hardware.usb.UsbDeviceConnection;
 import android.util.Log;
 
 import com.hoho.android.usbserial.util.MonotonicClock;
@@ -99,8 +98,8 @@ public class FtdiSerialDriver implements UsbSerialDriver {
 
 
         @Override
-        protected void openInt(UsbDeviceConnection connection) throws IOException {
-            if (!connection.claimInterface(mDevice.getInterface(mPortNumber), true)) {
+        protected void openInt() throws IOException {
+            if (!mConnection.claimInterface(mDevice.getInterface(mPortNumber), true)) {
                 throw new IOException("Could not claim interface " + mPortNumber);
             }
             if (mDevice.getInterface(mPortNumber).getEndpointCount() < 2) {
@@ -123,7 +122,7 @@ public class FtdiSerialDriver implements UsbSerialDriver {
             }
 
             // mDevice.getVersion() would require API 23
-            byte[] rawDescriptors = connection.getRawDescriptors();
+            byte[] rawDescriptors = mConnection.getRawDescriptors();
             if(rawDescriptors == null || rawDescriptors.length < 14) {
                 throw new IOException("Could not get device descriptors");
             }
diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java
index b5243cc..53cf664 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java
@@ -11,7 +11,6 @@ package com.hoho.android.usbserial.driver;
 
 import android.hardware.usb.UsbConstants;
 import android.hardware.usb.UsbDevice;
-import android.hardware.usb.UsbDeviceConnection;
 import android.hardware.usb.UsbEndpoint;
 import android.hardware.usb.UsbInterface;
 import android.util.Log;
@@ -265,10 +264,10 @@ public class ProlificSerialDriver implements UsbSerialDriver {
         }
 
         @Override
-        public void openInt(UsbDeviceConnection connection) throws IOException {
+        public void openInt() throws IOException {
             UsbInterface usbInterface = mDevice.getInterface(0);
 
-            if (!connection.claimInterface(usbInterface, true)) {
+            if (!mConnection.claimInterface(usbInterface, true)) {
                 throw new IOException("Error claiming Prolific interface 0");
             }
 
@@ -290,7 +289,7 @@ public class ProlificSerialDriver implements UsbSerialDriver {
                 }
             }
 
-            byte[] rawDescriptors = connection.getRawDescriptors();
+            byte[] rawDescriptors = mConnection.getRawDescriptors();
             if(rawDescriptors == null || rawDescriptors.length < 14) {
                 throw new IOException("Could not get device descriptors");
             }