diff --git a/src/pydase/data_service/data_service.py b/src/pydase/data_service/data_service.py
index 3c1d12d..e8183b8 100644
--- a/src/pydase/data_service/data_service.py
+++ b/src/pydase/data_service/data_service.py
@@ -70,7 +70,7 @@ class DataService(rpyc.Service, AbstractDataService):
 
         # every class defined by the user should inherit from DataService if it is
         # assigned to a public attribute
-        if not __name.startswith("_"):
+        if not __name.startswith("_") and not inspect.isfunction(__value):
             self.__warn_if_not_observable(__value)
 
         # Set the attribute
diff --git a/tests/data_service/test_data_service.py b/tests/data_service/test_data_service.py
index c0e0550..406b666 100644
--- a/tests/data_service/test_data_service.py
+++ b/tests/data_service/test_data_service.py
@@ -56,6 +56,9 @@ def test_basic_inheritance_warning(caplog: LogCaptureFixture) -> None:
         def some_method(self) -> None:
             ...
 
+        async def some_task(self) -> None:
+            ...
+
     ServiceClass()
 
     # neither of the attributes, methods or properties cause a warning log