diff --git a/da/dispersal.py b/da/dispersal.py
index 09607f1..a7a6039 100644
--- a/da/dispersal.py
+++ b/da/dispersal.py
@@ -28,9 +28,10 @@ class Dispersal:
         aggregated_column_commitment = encoded_data.aggregated_column_commitment
         aggregated_column_proofs = encoded_data.aggregated_column_proofs
         blobs_data = zip(columns, column_commitments, zip(*rows_proofs), aggregated_column_proofs)
-        for (column, column_commitment, row_proofs, column_proof) in blobs_data:
+        for column_idx, (column, column_commitment, row_proofs, column_proof) in enumerate(blobs_data):
             blob = DABlob(
                 column,
+                column_idx,
                 column_commitment,
                 aggregated_column_commitment,
                 column_proof,