diff --git a/app/src/main/java/us/shandian/giga/io/ChunkFileInputStream.java b/app/src/main/java/us/shandian/giga/io/ChunkFileInputStream.java
index 98015e37e..f7edf3975 100644
--- a/app/src/main/java/us/shandian/giga/io/ChunkFileInputStream.java
+++ b/app/src/main/java/us/shandian/giga/io/ChunkFileInputStream.java
@@ -104,7 +104,7 @@ public class ChunkFileInputStream extends SharpStream {
 
     @Override
     public long available() {
-        return (int) (length - position);
+        return length - position;
     }
 
     @SuppressWarnings("EmptyCatchBlock")
diff --git a/app/src/main/java/us/shandian/giga/io/CircularFileWriter.java b/app/src/main/java/us/shandian/giga/io/CircularFileWriter.java
index 102580570..d3dde7835 100644
--- a/app/src/main/java/us/shandian/giga/io/CircularFileWriter.java
+++ b/app/src/main/java/us/shandian/giga/io/CircularFileWriter.java
@@ -221,7 +221,7 @@ public class CircularFileWriter extends SharpStream {
                 available = out.length - offsetOut;
             }
 
-            int length = Math.min(len, (int) available);
+            int length = Math.min(len, (int) Math.min(Integer.MAX_VALUE, available));
             out.write(b, off, length);
 
             len -= length;