diff --git a/owrx/source/__init__.py b/owrx/source/__init__.py
index a0751b2..8ebd910 100644
--- a/owrx/source/__init__.py
+++ b/owrx/source/__init__.py
@@ -376,6 +376,9 @@ class SdrSource(ABC):
                 except ProcessLookupError:
                     # been killed by something else, ignore
                     pass
+                except AttributeError:
+                    # self.process has been overwritten by the monitor since we checked it, which is fine
+                    pass
             if self.monitor:
                 self.monitor.join()
             if self.tcpSource is not None: