diff --git a/birbnetes_iot_platform_raspberry/record_stuff.py b/birbnetes_iot_platform_raspberry/record_stuff.py
index bfcd014..74262e2 100644
--- a/birbnetes_iot_platform_raspberry/record_stuff.py
+++ b/birbnetes_iot_platform_raspberry/record_stuff.py
@@ -32,8 +32,8 @@ class SlicedRecorder(Thread):
         self._active = True
 
     def _request_new_file(self) -> Tuple[str, wave.Wave_write]:
-        _, record_path = tempfile.mkstemp(prefix="rec", suffix=".wav", dir=self._dest_folder)
-        wavefile = wave.open(record_path, 'wb')
+        file_handle, record_path = tempfile.mkstemp(prefix="rec", suffix=".wav", dir=self._dest_folder)
+        wavefile = wave.open(open(file_handle, 'wb'), 'wb')
         wavefile.setnchannels(1)  # mono
         wavefile.setframerate(self._sample_rate)
         wavefile.setsampwidth(self.BYTES_PER_SAMPLE)  # 16bit