diff --git a/python_src/lasp/lasp_record.py b/python_src/lasp/lasp_record.py
index 482c324..66adef2 100644
--- a/python_src/lasp/lasp_record.py
+++ b/python_src/lasp/lasp_record.py
@@ -208,7 +208,7 @@ class Recording:
 
                     recstatus = RecordStatus(curT=self.recordedTime, done=False)
 
-                    if self.recordedTime >= self._requiredRecordingLength:
+                    if self._requiredRecordingLength is not None and self.recordedTime >= self._requiredRecordingLength:
                         self._recState = RecordingState.AllDataStored
                         self._stop <<= True
                         recstatus.done = True
@@ -287,7 +287,7 @@ class Recording:
         with self._rec_mutex:
             if self._recState == RecordingState.Finished:
                 raise RuntimeError('Recording has already finished')
-            
+
             self._h5file.flush()
             # Remove indata handler, which also should remove callback function
             # from StreamMgr. This, however does not have to happen