diff --git a/src/urh/dev/native/SoundCard.py b/src/urh/dev/native/SoundCard.py
index 82b69e6c2d..3ed5aefc74 100644
--- a/src/urh/dev/native/SoundCard.py
+++ b/src/urh/dev/native/SoundCard.py
@@ -102,7 +102,8 @@ def __init__(self, sample_rate, resume_on_full_receive_buffer=False):
 
     @property
     def device_parameters(self) -> OrderedDict:
-        return OrderedDict([(self.Command.SET_SAMPLE_RATE.name, self.sample_rate)])
+        return OrderedDict([(self.Command.SET_SAMPLE_RATE.name, self.sample_rate),
+                            ("identifier", None)])
 
     @staticmethod
     def unpack_complex(buffer):