diff --git a/src/multicsv/file.py b/src/multicsv/file.py
index 2621852..13077c1 100644
--- a/src/multicsv/file.py
+++ b/src/multicsv/file.py
@@ -204,9 +204,6 @@ def flush(self) -> None:
         if not self._need_flush:
             return
 
-        if self._closed:
-            return
-
         initial_file_pos = self._file.tell()
         try:
             self._write_file()