diff --git a/imap_processing/swe/l1a/swe_science.py b/imap_processing/swe/l1a/swe_science.py
index 6b68d914c..15d371de0 100644
--- a/imap_processing/swe/l1a/swe_science.py
+++ b/imap_processing/swe/l1a/swe_science.py
@@ -142,7 +142,7 @@ def swe_science(decom_data: list, data_version: str) -> xr.Dataset:
         # Save data as np.int64 to be complaint with ISTP' FILLVAL
         science_array.append(uncompress_data.astype(np.int64))
         raw_science_array.append(raw_counts.astype(np.int64))
-        metadata_arrays = np.array(add_metadata_to_array(data_packet,metadata_arrays))
+        metadata_arrays = add_metadata_to_array(data_packet,metadata_arrays)
 
     # Load CDF attrs
     cdf_attrs = ImapCdfAttributes()