diff --git a/services/usb/java/com/android/server/usb/UsbDeviceManager.java b/services/usb/java/com/android/server/usb/UsbDeviceManager.java
index 1787b91..4cfa37a 100644
--- a/services/usb/java/com/android/server/usb/UsbDeviceManager.java
+++ b/services/usb/java/com/android/server/usb/UsbDeviceManager.java
@@ -49,10 +49,8 @@
 import com.android.server.FgThread;
 
 import java.io.File;
-import java.io.FileDescriptor;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.PrintWriter;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
@@ -807,8 +805,7 @@
         }
 
         private String getDefaultFunctions() {
-            return SystemProperties.get(USB_PERSISTENT_CONFIG_PROPERTY,
-                    UsbManager.USB_FUNCTION_ADB);
+            return mAdbEnabled ? UsbManager.USB_FUNCTION_ADB : UsbManager.USB_FUNCTION_MTP;
         }
 
         public void dump(IndentingPrintWriter pw) {