diff --git a/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java b/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java
index fa2e38d6e6..01d117922d 100644
--- a/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java
+++ b/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java
@@ -46,7 +46,6 @@ import static android.net.thread.ThreadNetworkManager.PERMISSION_THREAD_NETWORK_
 
 import static com.android.server.thread.openthread.IOtDaemon.ErrorCode.OT_ERROR_ABORT;
 import static com.android.server.thread.openthread.IOtDaemon.ErrorCode.OT_ERROR_BUSY;
-import static com.android.server.thread.openthread.IOtDaemon.ErrorCode.OT_ERROR_DETACHED;
 import static com.android.server.thread.openthread.IOtDaemon.ErrorCode.OT_ERROR_FAILED_PRECONDITION;
 import static com.android.server.thread.openthread.IOtDaemon.ErrorCode.OT_ERROR_INVALID_STATE;
 import static com.android.server.thread.openthread.IOtDaemon.ErrorCode.OT_ERROR_NO_BUFS;
@@ -756,7 +755,6 @@ final class ThreadNetworkControllerService extends IThreadNetworkController.Stub
                 return ERROR_THREAD_DISABLED;
             case OT_ERROR_FAILED_PRECONDITION:
                 return ERROR_FAILED_PRECONDITION;
-            case OT_ERROR_DETACHED:
             case OT_ERROR_INVALID_STATE:
             default:
                 return ERROR_INTERNAL_ERROR;