diff --git a/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp b/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp
index 7e114c40a3f4..b96540d13a82 100644
--- a/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp
+++ b/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp
@@ -177,11 +177,7 @@ template <IsUltraFlavor Flavor> class DeciderProvingKey_ {
                     proving_key.polynomials.return_data_read_tags =
                         Polynomial(MAX_DATABUS_SIZE, proving_key.circuit_size);
 
-                    // TODO(https://github.com/AztecProtocol/barretenberg/issues/1107): Restricting databus_id to
-                    // databus_size leads to failure.
-                    // const size_t databus_size = std::max({ calldata.size(), secondary_calldata.size(),
-                    // return_data.size() });
-                    proving_key.polynomials.databus_id = Polynomial(proving_key.circuit_size, proving_key.circuit_size);
+                    proving_key.polynomials.databus_id = Polynomial(MAX_DATABUS_SIZE, proving_key.circuit_size);
                 }
                 const size_t max_tables_size =
                     std::min(static_cast<size_t>(MAX_LOOKUP_TABLES_SIZE), dyadic_circuit_size - 1);