diff --git a/src/pynwb/data/nwb.ecephys.yaml b/src/pynwb/data/nwb.ecephys.yaml
index 48c1afadd..ad3d538aa 100644
--- a/src/pynwb/data/nwb.ecephys.yaml
+++ b/src/pynwb/data/nwb.ecephys.yaml
@@ -349,4 +349,3 @@ groups:
   - name: device
     target_type: Device
     doc: the device that was used to record from this electrode group
-    quantity: '?'