diff --git a/libraries/chain/include/eosio/chain/wasm_interface_private.hpp b/libraries/chain/include/eosio/chain/wasm_interface_private.hpp
index ac5687b882..faa4e0f260 100644
--- a/libraries/chain/include/eosio/chain/wasm_interface_private.hpp
+++ b/libraries/chain/include/eosio/chain/wasm_interface_private.hpp
@@ -109,24 +109,6 @@ namespace eosio { namespace chain {
          return it != wasm_instantiation_cache.end();
       }
 
-      std::vector<uint8_t> parse_initial_memory(const Module& module) {
-         std::vector<uint8_t> mem_image;
-
-         for(const DataSegment& data_segment : module.dataSegments) {
-            EOS_ASSERT(data_segment.baseOffset.type == InitializerExpression::Type::i32_const, wasm_exception, "");
-            EOS_ASSERT(module.memories.defs.size(), wasm_exception, "");
-            const U32 base_offset = data_segment.baseOffset.i32;
-            const Uptr memory_size = (module.memories.defs[0].type.size.min << IR::numBytesPerPageLog2);
-            if(base_offset >= memory_size || base_offset + data_segment.data.size() > memory_size)
-               FC_THROW_EXCEPTION(wasm_execution_error, "WASM data segment outside of valid memory range");
-            if(base_offset + data_segment.data.size() > mem_image.size())
-               mem_image.resize(base_offset + data_segment.data.size(), 0x00);
-            memcpy(mem_image.data() + base_offset, data_segment.data.data(), data_segment.data.size());
-         }
-
-         return mem_image;
-      }
-
       void code_block_num_last_used(const digest_type& code_hash, const uint8_t& vm_type, const uint8_t& vm_version, const uint32_t& block_num) {
          wasm_cache_index::iterator it = wasm_instantiation_cache.find(boost::make_tuple(code_hash, vm_type, vm_version));
          if(it != wasm_instantiation_cache.end())
@@ -173,24 +155,8 @@ namespace eosio { namespace chain {
                trx_context.resume_billing_timer();
             });
             trx_context.pause_billing_timer();
-            IR::Module module;
-            std::vector<U8> bytes = {
-                (const U8*)codeobject->code.data(),
-                (const U8*)codeobject->code.data() + codeobject->code.size()};
-            try {
-               Serialization::MemoryInputStream stream((const U8*)bytes.data(),
-                                                       bytes.size());
-               WASM::scoped_skip_checks no_check;
-               WASM::serialize(stream, module);
-               module.userSections.clear();
-            } catch (const Serialization::FatalSerializationException& e) {
-               EOS_ASSERT(false, wasm_serialization_error, e.message.c_str());
-            } catch (const IR::ValidationException& e) {
-               EOS_ASSERT(false, wasm_serialization_error, e.message.c_str());
-            }
-
             wasm_instantiation_cache.modify(it, [&](auto& c) {
-               c.module = runtime_interface->instantiate_module((const char*)bytes.data(), bytes.size(), parse_initial_memory(module), code_hash, vm_type, vm_version);
+               c.module = runtime_interface->instantiate_module(codeobject->code.data(), codeobject->code.size(), code_hash, vm_type, vm_version);
             });
          }
          return it->module;
diff --git a/libraries/chain/include/eosio/chain/webassembly/eos-vm-oc.hpp b/libraries/chain/include/eosio/chain/webassembly/eos-vm-oc.hpp
index 02dcf48a19..4eb751d0c0 100644
--- a/libraries/chain/include/eosio/chain/webassembly/eos-vm-oc.hpp
+++ b/libraries/chain/include/eosio/chain/webassembly/eos-vm-oc.hpp
@@ -30,7 +30,7 @@ class eosvmoc_runtime : public eosio::chain::wasm_runtime_interface {
    public:
       eosvmoc_runtime(const boost::filesystem::path data_dir, const eosvmoc::config& eosvmoc_config, const chainbase::database& db);
       ~eosvmoc_runtime();
-      std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size, std::vector<uint8_t> initial_memory,
+      std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size,
                                                                              const digest_type& code_hash, const uint8_t& vm_type, const uint8_t& vm_version) override;
 
       void immediately_exit_currently_running_module() override;
diff --git a/libraries/chain/include/eosio/chain/webassembly/eos-vm.hpp b/libraries/chain/include/eosio/chain/webassembly/eos-vm.hpp
index 94669c383f..9301676850 100644
--- a/libraries/chain/include/eosio/chain/webassembly/eos-vm.hpp
+++ b/libraries/chain/include/eosio/chain/webassembly/eos-vm.hpp
@@ -43,7 +43,7 @@ template<typename Backend>
 class eos_vm_runtime : public eosio::chain::wasm_runtime_interface {
    public:
       eos_vm_runtime();
-      std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size, std::vector<uint8_t>,
+      std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size,
                                                                              const digest_type& code_hash, const uint8_t& vm_type, const uint8_t& vm_version) override;
 
       void immediately_exit_currently_running_module() override;
@@ -61,7 +61,7 @@ class eos_vm_runtime : public eosio::chain::wasm_runtime_interface {
 class eos_vm_profile_runtime : public eosio::chain::wasm_runtime_interface {
    public:
       eos_vm_profile_runtime();
-      std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size, std::vector<uint8_t>,
+      std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size,
                                                                              const digest_type& code_hash, const uint8_t& vm_type, const uint8_t& vm_version) override;
 
       void immediately_exit_currently_running_module() override;
diff --git a/libraries/chain/include/eosio/chain/webassembly/runtime_interface.hpp b/libraries/chain/include/eosio/chain/webassembly/runtime_interface.hpp
index 685fe86f33..1c999f0bcd 100644
--- a/libraries/chain/include/eosio/chain/webassembly/runtime_interface.hpp
+++ b/libraries/chain/include/eosio/chain/webassembly/runtime_interface.hpp
@@ -20,7 +20,7 @@ class wasm_instantiated_module_interface {
 
 class wasm_runtime_interface {
    public:
-      virtual std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size, std::vector<uint8_t> initial_memory,
+      virtual std::unique_ptr<wasm_instantiated_module_interface> instantiate_module(const char* code_bytes, size_t code_size,
                                                                                      const digest_type& code_hash, const uint8_t& vm_type, const uint8_t& vm_version) = 0;
 
       //immediately exit the currently running wasm_instantiated_module_interface. Yep, this assumes only one can possibly run at a time.
diff --git a/libraries/chain/webassembly/runtimes/eos-vm-oc.cpp b/libraries/chain/webassembly/runtimes/eos-vm-oc.cpp
index 831c507b4f..c4ba7335ce 100644
--- a/libraries/chain/webassembly/runtimes/eos-vm-oc.cpp
+++ b/libraries/chain/webassembly/runtimes/eos-vm-oc.cpp
@@ -50,7 +50,7 @@ eosvmoc_runtime::eosvmoc_runtime(const boost::filesystem::path data_dir, const e
 eosvmoc_runtime::~eosvmoc_runtime() {
 }
 
-std::unique_ptr<wasm_instantiated_module_interface> eosvmoc_runtime::instantiate_module(const char* code_bytes, size_t code_size, std::vector<uint8_t> initial_memory,
+std::unique_ptr<wasm_instantiated_module_interface> eosvmoc_runtime::instantiate_module(const char* code_bytes, size_t code_size,
                                                                                         const digest_type& code_hash, const uint8_t& vm_type, const uint8_t& vm_version) {
    return std::make_unique<eosvmoc_instantiated_module>(code_hash, vm_type, *this);
 }
diff --git a/libraries/chain/webassembly/runtimes/eos-vm.cpp b/libraries/chain/webassembly/runtimes/eos-vm.cpp
index 1d78a1a7fa..39e549706e 100644
--- a/libraries/chain/webassembly/runtimes/eos-vm.cpp
+++ b/libraries/chain/webassembly/runtimes/eos-vm.cpp
@@ -239,7 +239,7 @@ void eos_vm_runtime<Impl>::immediately_exit_currently_running_module() {
 }
 
 template<typename Impl>
-std::unique_ptr<wasm_instantiated_module_interface> eos_vm_runtime<Impl>::instantiate_module(const char* code_bytes, size_t code_size, std::vector<uint8_t>,
+std::unique_ptr<wasm_instantiated_module_interface> eos_vm_runtime<Impl>::instantiate_module(const char* code_bytes, size_t code_size,
                                                                                              const digest_type&, const uint8_t&, const uint8_t&) {
 
    using backend_t = eos_vm_backend_t<Impl>;
@@ -265,7 +265,7 @@ void eos_vm_profile_runtime::immediately_exit_currently_running_module() {
    throw wasm_exit{};
 }
 
-std::unique_ptr<wasm_instantiated_module_interface> eos_vm_profile_runtime::instantiate_module(const char* code_bytes, size_t code_size, std::vector<uint8_t>,
+std::unique_ptr<wasm_instantiated_module_interface> eos_vm_profile_runtime::instantiate_module(const char* code_bytes, size_t code_size,
                                                                                                const digest_type&, const uint8_t&, const uint8_t&) {
 
    using backend_t = eosio::vm::backend<eos_vm_host_functions_t, eosio::vm::jit_profile, webassembly::eos_vm_runtime::apply_options, vm::profile_instr_map>;