diff --git a/backend/app/routers/operations_bancaires.py b/backend/app/routers/operations_bancaires.py
index ab76756..606714a 100644
--- a/backend/app/routers/operations_bancaires.py
+++ b/backend/app/routers/operations_bancaires.py
@@ -130,6 +130,14 @@ async def enregistrer_operation(
         action=f"operation.{op.type}",
         raison=f"Opération bancaire enregistrée : {op.type}.",
         membre_id=membre.id,
+        avant={},
+        apres={
+            "type": op.type,
+            "montant": float(op.montant),
+            "date_operation": op.date_operation.isoformat(),
+            "provenance": provenance_depot if op.type == "depot" else None,
+            "note": op.note,
+        },
     )
     await db.flush()
     return OperationBancaireOut(