diff --git a/cpp/barretenberg b/cpp/barretenberg
index 303eaf6e..458d7db8 160000
--- a/cpp/barretenberg
+++ b/cpp/barretenberg
@@ -1 +1 @@
-Subproject commit 303eaf6e169acede64046a465146aab67036ab43
+Subproject commit 458d7db8beaa9ca87e53571f7819c09f7c43568e
diff --git a/cpp/src/aztec3/circuits/abis/private_kernel/previous_kernel_data.hpp b/cpp/src/aztec3/circuits/abis/private_kernel/previous_kernel_data.hpp
index a9762913..41b30315 100644
--- a/cpp/src/aztec3/circuits/abis/private_kernel/previous_kernel_data.hpp
+++ b/cpp/src/aztec3/circuits/abis/private_kernel/previous_kernel_data.hpp
@@ -88,7 +88,8 @@ template <typename NCT> std::ostream& operator<<(std::ostream& os, PreviousKerne
 {
     return os << "public_inputs: " << kernel_data.public_inputs << "\n"
               << "proof: " << kernel_data.proof << "\n"
-              << "vk: " << kernel_data.vk << "\n"
+              << "vk:\n"
+              << *(kernel_data.vk) << "\n"
               << "vk_index: " << kernel_data.vk_index << "\n"
               << "vk_path: " << kernel_data.vk_path << "\n";
 }
diff --git a/cpp/src/aztec3/circuits/abis/private_kernel/private_call_data.hpp b/cpp/src/aztec3/circuits/abis/private_kernel/private_call_data.hpp
index 3edf39cf..8f37f4c4 100644
--- a/cpp/src/aztec3/circuits/abis/private_kernel/private_call_data.hpp
+++ b/cpp/src/aztec3/circuits/abis/private_kernel/private_call_data.hpp
@@ -102,7 +102,7 @@ template <typename NCT> std::ostream& operator<<(std::ostream& os, PrivateCallDa
               << "proof:\n"
               << obj.proof << "\n"
               << "vk:\n"
-              << obj.vk << "\n"
+              << *(obj.vk) << "\n"
               << "function_leaf_membership_witness:\n"
               << obj.function_leaf_membership_witness << "\n"
               << "contract_leaf_membership_witness:\n"
diff --git a/cpp/src/aztec3/circuits/abis/rollup/base/previous_rollup_data.hpp b/cpp/src/aztec3/circuits/abis/rollup/base/previous_rollup_data.hpp
index b9824dff..31d73d4a 100644
--- a/cpp/src/aztec3/circuits/abis/rollup/base/previous_rollup_data.hpp
+++ b/cpp/src/aztec3/circuits/abis/rollup/base/previous_rollup_data.hpp
@@ -51,7 +51,7 @@ template <typename NCT> std::ostream& operator<<(std::ostream& os, PreviousRollu
 {
     return os << "merge_rollup_public_inputs: " << obj.base_rollup_public_inputs << "\n"
               << "proof: " << obj.proof << "\n"
-              << "vk: " << obj.vk << "\n"
+              << "vk: " << *(obj.vk) << "\n"
               << "vk_index: " << obj.vk_index << "\n"
               << "vk_sibling_path: " << obj.vk_sibling_path << "\n";
 };