diff --git a/okdownload/src/main/java/com/liulishuo/okdownload/core/file/MultiPointOutputStream.java b/okdownload/src/main/java/com/liulishuo/okdownload/core/file/MultiPointOutputStream.java
index bd16ea9e..ea8f1fea 100644
--- a/okdownload/src/main/java/com/liulishuo/okdownload/core/file/MultiPointOutputStream.java
+++ b/okdownload/src/main/java/com/liulishuo/okdownload/core/file/MultiPointOutputStream.java
@@ -48,6 +48,8 @@
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.locks.LockSupport;
 
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+
 public class MultiPointOutputStream {
     private static final String TAG = "MultiPointOutputStream";
     private static final ExecutorService FILE_IO_EXECUTOR = new ThreadPoolExecutor(0,
@@ -81,6 +83,7 @@ public class MultiPointOutputStream {
     IOException syncException;
     @NonNull ArrayList<Integer> noMoreStreamList;
 
+    @SuppressFBWarnings("IS2_INCONSISTENT_SYNC")
     List<Integer> requireStreamBlocks;
 
     MultiPointOutputStream(@NonNull final DownloadTask task,