diff --git a/bb2etp.py b/bb2etp.py
index 7d324d6f6cd61243edc4c8cc05d19ef3f8b563d4..2c6781aa8f1bb18fc540ebe57e31fed0b24065d5 100644
--- a/bb2etp.py
+++ b/bb2etp.py
@@ -37,6 +37,8 @@ class BeambackgroundMetadata:
     run: int = 0
     bucket: str = 0
     date: str = 0
+    n_cdc_hits: float = 0
+    n_out_of_time_crystals: float = 0
     beam_energy: str = None
     qualitiy: bool = None
     global_tags: List[str] = field(default_factory=list)