diff --git a/barretenberg/cpp/src/barretenberg/crypto/blake2s/c_bind.hpp b/barretenberg/cpp/src/barretenberg/crypto/blake2s/c_bind.hpp
index c1e14c07a00e..cf124a5a6c9e 100644
--- a/barretenberg/cpp/src/barretenberg/crypto/blake2s/c_bind.hpp
+++ b/barretenberg/cpp/src/barretenberg/crypto/blake2s/c_bind.hpp
@@ -3,5 +3,11 @@
 #include <cstddef>
 #include <cstdint>
 
+extern "C" {
+
+using namespace bb;
+
 WASM_EXPORT void blake2s(uint8_t const* data, out_buf32 r);
+
 WASM_EXPORT void blake2s_to_field_(uint8_t const* data, fr::out_buf r);
+}
diff --git a/barretenberg/cpp/src/barretenberg/crypto/pedersen_commitment/c_bind.hpp b/barretenberg/cpp/src/barretenberg/crypto/pedersen_commitment/c_bind.hpp
index d90b4234cab4..a4a37b9eac54 100644
--- a/barretenberg/cpp/src/barretenberg/crypto/pedersen_commitment/c_bind.hpp
+++ b/barretenberg/cpp/src/barretenberg/crypto/pedersen_commitment/c_bind.hpp
@@ -3,4 +3,10 @@
 #include "barretenberg/ecc/curves/bn254/fr.hpp"
 #include "barretenberg/ecc/curves/grumpkin/grumpkin.hpp"
 
-WASM_EXPORT void pedersen_commit(bb::fr::vec_in_buf inputs_buffer, bb::grumpkin::g1::affine_element::out_buf output);
\ No newline at end of file
+extern "C" {
+
+using namespace bb;
+using affine_element = grumpkin::g1::affine_element;
+
+WASM_EXPORT void pedersen_commit(fr::vec_in_buf inputs_buffer, affine_element::out_buf output);
+}
\ No newline at end of file
diff --git a/barretenberg/cpp/src/barretenberg/crypto/pedersen_hash/c_bind.hpp b/barretenberg/cpp/src/barretenberg/crypto/pedersen_hash/c_bind.hpp
index cb39f6a6a425..e25cc79d1f32 100644
--- a/barretenberg/cpp/src/barretenberg/crypto/pedersen_hash/c_bind.hpp
+++ b/barretenberg/cpp/src/barretenberg/crypto/pedersen_hash/c_bind.hpp
@@ -3,6 +3,11 @@
 #include "barretenberg/common/wasm_export.hpp"
 #include "barretenberg/ecc/curves/bn254/fr.hpp"
 
-WASM_EXPORT void pedersen_hash(bb::fr::vec_in_buf inputs_buffer, uint32_t const* hash_index, bb::fr::out_buf output);
-WASM_EXPORT void pedersen_hashes(bb::fr::vec_in_buf inputs_buffer, uint32_t const* hash_index, bb::fr::out_buf output);
-WASM_EXPORT void pedersen_hash_buffer(uint8_t const* input_buffer, uint32_t const* hash_index, bb::fr::out_buf output);
\ No newline at end of file
+extern "C" {
+
+using namespace bb;
+
+WASM_EXPORT void pedersen_hash(fr::vec_in_buf inputs_buffer, uint32_t const* hash_index, fr::out_buf output);
+WASM_EXPORT void pedersen_hashes(fr::vec_in_buf inputs_buffer, uint32_t const* hash_index, fr::out_buf output);
+WASM_EXPORT void pedersen_hash_buffer(uint8_t const* input_buffer, uint32_t const* hash_index, fr::out_buf output);
+}
\ No newline at end of file
diff --git a/barretenberg/cpp/src/barretenberg/crypto/poseidon2/c_bind.hpp b/barretenberg/cpp/src/barretenberg/crypto/poseidon2/c_bind.hpp
index 9915e0825766..e113b523dd18 100644
--- a/barretenberg/cpp/src/barretenberg/crypto/poseidon2/c_bind.hpp
+++ b/barretenberg/cpp/src/barretenberg/crypto/poseidon2/c_bind.hpp
@@ -3,5 +3,10 @@
 #include "barretenberg/common/wasm_export.hpp"
 #include "barretenberg/ecc/curves/bn254/fr.hpp"
 
-WASM_EXPORT void poseidon_hash(bb::fr::vec_in_buf inputs_buffer, bb::fr::out_buf output);
-WASM_EXPORT void poseidon_hashes(bb::fr::vec_in_buf inputs_buffer, bb::fr::out_buf output);
\ No newline at end of file
+extern "C" {
+
+using namespace bb;
+
+WASM_EXPORT void poseidon_hash(fr::vec_in_buf inputs_buffer, fr::out_buf output);
+WASM_EXPORT void poseidon_hashes(fr::vec_in_buf inputs_buffer, fr::out_buf output);
+}
\ No newline at end of file
diff --git a/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.cpp b/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.cpp
index 79cc4b44767e..b5fc5570e86a 100644
--- a/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.cpp
+++ b/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.cpp
@@ -3,6 +3,8 @@
 #include "schnorr.hpp"
 
 using namespace bb;
+using namespace bb::crypto;
+
 using affine_element = grumpkin::g1::affine_element;
 using multisig = crypto::schnorr_multisig<grumpkin::g1, KeccakHasher, Blake2sHasher>;
 using multisig_public_key = typename multisig::MultiSigPublicKey;
diff --git a/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.hpp b/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.hpp
index 9e4991ff7c35..51fd3f33a8db 100644
--- a/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.hpp
+++ b/barretenberg/cpp/src/barretenberg/crypto/schnorr/c_bind.hpp
@@ -3,11 +3,11 @@
 #include "barretenberg/ecc/curves/grumpkin/grumpkin.hpp"
 #include "multisig.hpp"
 
-using namespace bb;
-using namespace bb::crypto;
+extern "C" {
 
+using namespace bb;
 using affine_element = grumpkin::g1::affine_element;
-using multisig = schnorr_multisig<grumpkin::g1, KeccakHasher, Blake2sHasher>;
+using multisig = crypto::schnorr_multisig<grumpkin::g1, bb::crypto::KeccakHasher, bb::crypto::Blake2sHasher>;
 
 WASM_EXPORT void schnorr_compute_public_key(fr::in_buf private_key, affine_element::out_buf public_key_buf);
 WASM_EXPORT void schnorr_negate_public_key(affine_element::in_buf public_key_buffer, affine_element::out_buf output);
@@ -42,4 +42,5 @@ WASM_EXPORT void schnorr_multisig_combine_signatures(uint8_t const* message,
                                                      fq::vec_in_buf round_two_buf,
                                                      out_buf32 s,
                                                      out_buf32 e,
-                                                     bool* success);
\ No newline at end of file
+                                                     bool* success);
+}