diff --git a/s3/file.go b/s3/file.go
index 3d59aa2..b20d247 100644
--- a/s3/file.go
+++ b/s3/file.go
@@ -86,7 +86,10 @@ func (f *S3File) Read(p []byte) (n int, err error) {
 }
 
 func (f *S3File) ReadAt(p []byte, off int64) (n int, err error) {
-  if f.eof {
+  stat, err := f.Stat()
+  if err != nil {
+    return 0, err
+  } else if off >= stat.Size() {
     return 0, io.EOF
   }
 
@@ -95,10 +98,7 @@ func (f *S3File) ReadAt(p []byte, off int64) (n int, err error) {
 		return 0, err
 	}
 
-  n, err = f.obj.ReadAt(p, off)
-  f.eof = err == io.EOF
-
-  return
+  return f.obj.ReadAt(p, off)
 }
 
 func (f *S3File) WriteAt(p []byte, off int64) (n int, err error) {