diff --git a/src/goofi/nodes/outputs/audioout.py b/src/goofi/nodes/outputs/audioout.py
index 23d9c04..20aff0a 100644
--- a/src/goofi/nodes/outputs/audioout.py
+++ b/src/goofi/nodes/outputs/audioout.py
@@ -9,6 +9,9 @@ class AudioOut(Node):
     def config_input_slots():
         return {"data": DataType.ARRAY}
 
+    def config_output_slots():
+        return {"finished": DataType.ARRAY}
+
     def config_params():
         return {
             "audio": {
@@ -65,6 +68,8 @@ def process(self, data: Data):
         # Send the audio data to the output device after ensuring it's C-contiguous
         self.stream.write(np.ascontiguousarray(samples))
 
+        return {"finished": (np.array([1]), {})}
+
     def audio_sampling_rate_changed(self, value):
         self.setup()