diff --git a/yarn-project/aztec-nr/authwit/src/entrypoint.nr b/yarn-project/aztec-nr/authwit/src/entrypoint.nr
index 98987d49e362..13407a40eccc 100644
--- a/yarn-project/aztec-nr/authwit/src/entrypoint.nr
+++ b/yarn-project/aztec-nr/authwit/src/entrypoint.nr
@@ -1,13 +1,6 @@
-use dep::aztec::abi;
 use dep::aztec::context::PrivateContext;
 use dep::aztec::protocol_types::{
-  abis::{
-    call_stack_item::{
-      PrivateCallStackItem,
-      PublicCallStackItem,
-    },
-    function_selector::FunctionSelector,
-  },
+  abis::function_selector::FunctionSelector,
   address::AztecAddress,
   constants::GENERATOR_INDEX__SIGNATURE_PAYLOAD,
   hash::pedersen_hash,
diff --git a/yarn-project/aztec-nr/aztec/src/context.nr b/yarn-project/aztec-nr/aztec/src/context.nr
index c1e8bd5404c6..43ded219403c 100644
--- a/yarn-project/aztec-nr/aztec/src/context.nr
+++ b/yarn-project/aztec-nr/aztec/src/context.nr
@@ -24,10 +24,10 @@ use dep::protocol_types::{
         function_data::FunctionData,
         function_selector::FunctionSelector,
         nullifier_key_validation_request::NullifierKeyValidationRequest,
+        private_call_stack_item::PrivateCallStackItem,
         private_circuit_public_inputs::PrivateCircuitPublicInputs,
+        public_call_stack_item::PublicCallStackItem,
         public_circuit_public_inputs::PublicCircuitPublicInputs,
-        call_stack_item::PrivateCallStackItem,
-        call_stack_item::PublicCallStackItem,
         side_effect::{SideEffect, SideEffectLinkedToNoteHash},
     },
     address::{
diff --git a/yarn-project/noir-protocol-circuits/src/crates/public-kernel-lib/src/common.nr b/yarn-project/noir-protocol-circuits/src/crates/public-kernel-lib/src/common.nr
index 879295866260..10991a2d2e56 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/public-kernel-lib/src/common.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/public-kernel-lib/src/common.nr
@@ -1,7 +1,7 @@
 use dep::types::{
     abis::{
         call_request::CallRequest,
-        call_stack_item::PublicCallStackItem,
+        public_call_stack_item::PublicCallStackItem,
         combined_accumulated_data::{CombinedAccumulatedData, CombinedAccumulatedDataBuilder},
         kernel_circuit_public_inputs::KernelCircuitPublicInputsBuilder,
         new_contract_data::NewContractData,
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis.nr
index 47605e17f6c5..a6edd512cebd 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis.nr
@@ -25,7 +25,8 @@ mod kernel_circuit_public_inputs;
 mod previous_kernel_data;
 
 mod call_request;
-mod call_stack_item;
+mod private_call_stack_item;
+mod public_call_stack_item;
 mod call_context;
 
 mod public_call_data;
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/private_call_stack_item.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/private_call_stack_item.nr
new file mode 100644
index 000000000000..1f72d1063449
--- /dev/null
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/private_call_stack_item.nr
@@ -0,0 +1,30 @@
+use crate::abis::{
+    function_data::FunctionData,
+    private_circuit_public_inputs::PrivateCircuitPublicInputs,
+};
+use crate::address::AztecAddress;
+use crate::constants::GENERATOR_INDEX__CALL_STACK_ITEM;
+use crate::traits::Hash;
+
+struct PrivateCallStackItem {
+    // This is the _actual_ contract address relating to where this function's code resides in the
+    // contract tree. Regardless of whether this is a call or delegatecall, this
+    // `contract_address` _does not change_. Amongst other things, it's used as a lookup for
+    // getting the correct code from the tree. There is a separate `storage_contract_address`
+    // within a CallStackItem which varies depending on whether this is a call or delegatecall.
+    contract_address: AztecAddress,
+    public_inputs: PrivateCircuitPublicInputs,
+    function_data: FunctionData,
+    // Not really needed for PrivateCallStackItem.
+    is_execution_request: bool,
+}
+
+impl Hash for PrivateCallStackItem {
+    fn hash(self) -> Field {
+        dep::std::hash::pedersen_hash_with_separator([
+            self.contract_address.to_field(),
+            self.function_data.hash(),
+            self.public_inputs.hash(),
+        ], GENERATOR_INDEX__CALL_STACK_ITEM)
+    }
+}
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/private_kernel/private_call_data.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/private_kernel/private_call_data.nr
index fb7bde97e681..b0365bbdb400 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/private_kernel/private_call_data.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/private_kernel/private_call_data.nr
@@ -1,6 +1,6 @@
 use crate::abis::{
     call_request::CallRequest,
-    call_stack_item::PrivateCallStackItem,
+    private_call_stack_item::PrivateCallStackItem,
     membership_witness::{
         ContractLeafMembershipWitness,
         FunctionLeafMembershipWitness,
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/public_call_data.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/public_call_data.nr
index bc59e74e109b..fc57026db5b5 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/public_call_data.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/public_call_data.nr
@@ -1,7 +1,7 @@
 use crate::{
     abis::{
         call_request::CallRequest,
-        call_stack_item::PublicCallStackItem,
+        public_call_stack_item::PublicCallStackItem,
     },
     address::EthAddress,
     mocked::Proof,
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/call_stack_item.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/public_call_stack_item.nr
similarity index 58%
rename from yarn-project/noir-protocol-circuits/src/crates/types/src/abis/call_stack_item.nr
rename to yarn-project/noir-protocol-circuits/src/crates/types/src/abis/public_call_stack_item.nr
index 45ebceaf0105..879b5e7d768f 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/call_stack_item.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/public_call_stack_item.nr
@@ -1,37 +1,11 @@
 use crate::abis::{
     function_data::FunctionData,
-    private_circuit_public_inputs::PrivateCircuitPublicInputs,
     public_circuit_public_inputs::PublicCircuitPublicInputs,
 };
 use crate::address::AztecAddress;
-use crate::constants::{
-    GENERATOR_INDEX__CALL_STACK_ITEM,
-};
+use crate::constants::GENERATOR_INDEX__CALL_STACK_ITEM;
 use crate::traits::Hash;
 
-struct PrivateCallStackItem {
-    // This is the _actual_ contract address relating to where this function's code resides in the
-    // contract tree. Regardless of whether this is a call or delegatecall, this
-    // `contract_address` _does not change_. Amongst other things, it's used as a lookup for
-    // getting the correct code from the tree. There is a separate `storage_contract_address`
-    // within a CallStackItem which varies depending on whether this is a call or delegatecall.
-    contract_address: AztecAddress,
-    public_inputs: PrivateCircuitPublicInputs,
-    function_data: FunctionData,
-    // Not really needed for PrivateCallStackItem.
-    is_execution_request: bool,
-}
-
-impl Hash for PrivateCallStackItem {
-    fn hash(self) -> Field {
-        dep::std::hash::pedersen_hash_with_separator([
-            self.contract_address.to_field(),
-            self.function_data.hash(),
-            self.public_inputs.hash(),
-        ], GENERATOR_INDEX__CALL_STACK_ITEM)
-    }
-}
-
 struct PublicCallStackItem {
     contract_address: AztecAddress,
     public_inputs: PublicCircuitPublicInputs,
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/interop_testing.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/interop_testing.nr
index e5d28d3eb487..7e80d5268f52 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/interop_testing.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/interop_testing.nr
@@ -7,7 +7,7 @@ use crate::abis::function_leaf_preimage::FunctionLeafPreimage;
 use crate::contrakt::deployment_data::ContractDeploymentData;
 use crate::abis::function_selector::FunctionSelector;
 use crate::hash::{compute_l2_to_l1_hash, sha256_to_field};
-use crate::abis::call_stack_item::PublicCallStackItem;
+use crate::abis::public_call_stack_item::PublicCallStackItem;
 use crate::abis::public_circuit_public_inputs::PublicCircuitPublicInputs;
 use crate::abis::side_effect::SideEffect;
 use crate::contract_class::ContractClassId;
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/private_call_data_builder.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/private_call_data_builder.nr
index 4bfa514397a3..94053da6cd1d 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/private_call_data_builder.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/private_call_data_builder.nr
@@ -1,7 +1,7 @@
 use crate::{
     abis::{
         call_request::{CallerContext, CallRequest},
-        call_stack_item::PrivateCallStackItem,
+        private_call_stack_item::PrivateCallStackItem,
         function_data::FunctionData,
         membership_witness::{
             ContractLeafMembershipWitness,
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/public_call_data_builder.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/public_call_data_builder.nr
index 48dd0bb62e10..77f9c6164cb1 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/public_call_data_builder.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/tests/public_call_data_builder.nr
@@ -2,9 +2,9 @@ use crate::{
     abis::{
         call_context::CallContext,
         call_request::{CallerContext, CallRequest},
-        call_stack_item::PublicCallStackItem,
         function_data::FunctionData,
         public_call_data::PublicCallData,
+        public_call_stack_item::PublicCallStackItem,
         public_circuit_public_inputs::PublicCircuitPublicInputs,
     },
     address::{AztecAddress, EthAddress},