diff --git a/src/env_base.cpp b/src/env_base.cpp
index 33a4cac..c4d33fa 100644
--- a/src/env_base.cpp
+++ b/src/env_base.cpp
@@ -87,6 +87,16 @@ detail::EnvVarProxy<std::string> EnvBase::operator[] (const std::string& name) n
 	return {to_string(name), this};
 }
 
+std::optional<std::string_view> EnvBase::get (std::string_view name) const noexcept {
+	StdMutex m(this->mutex());
+	return call_noexcept([&,this](){return this->get_implem(name, m);}, to_string_view(__func__));
+}
+
+std::string_view EnvBase::get (std::string_view name, std::string_view def) const noexcept {
+	StdMutex m(this->mutex());
+	return call_noexcept([&,this](){return this->get_implem(name, def, m);}, to_string_view(__func__));
+}
+
 void EnvBase::set (std::string_view name, std::string_view value) {
 	StdMutex m(this->mutex());
 	this->set_implem(name, value, m);
diff --git a/src/env_base.hpp b/src/env_base.hpp
index 2567597..9b96ac4 100644
--- a/src/env_base.hpp
+++ b/src/env_base.hpp
@@ -65,8 +65,8 @@ namespace duck {
 		detail::EnvVarProxy<std::string> operator[] (std::string&& name) noexcept;
 		detail::EnvVarProxy<std::string> operator[] (const std::string& name) noexcept;
 
-		virtual std::optional<std::string_view> get (std::string_view name) const noexcept = 0;
-		virtual std::string_view get (std::string_view name, std::string_view def) const noexcept = 0;
+		std::optional<std::string_view> get (std::string_view name) const noexcept;
+		std::string_view get (std::string_view name, std::string_view def) const noexcept;
 		void set (std::string_view name, std::string_view value);
 		void unset (std::string_view name) noexcept;
 		bool is_set (std::string_view name) const noexcept;
@@ -82,6 +82,8 @@ namespace duck {
 		virtual void clear_implem(Mutex& m) = 0;
 		static void clear_nolock (EnvBase& obj) noexcept;
 
+		virtual std::optional<std::string_view> get_implem (std::string_view name, Mutex& m) const = 0;
+		virtual std::string_view get_implem (std::string_view name, std::string_view def, Mutex& m) const = 0;
 		virtual void set_implem (std::string_view name, std::string_view value, Mutex& m) = 0;
 		static void set_nolock (EnvBase& obj, std::string_view name, std::string_view value);
 
diff --git a/src/env_fake.cpp b/src/env_fake.cpp
index 169d3fa..844d366 100644
--- a/src/env_fake.cpp
+++ b/src/env_fake.cpp
@@ -74,12 +74,14 @@ EnvFake::EnvFake (bool starts_empty) :
 {
 }
 
-std::optional<std::string_view> EnvFake::get (std::string_view name) const noexcept {
+std::optional<std::string_view> EnvFake::get_implem (std::string_view name, Mutex& m) const {
+	std::lock_guard<Mutex> lock(m);
 	return run_if_found(m_map, name, [](auto& it)noexcept{return std::make_optional(it->second);});
 }
 
-std::string_view EnvFake::get (std::string_view name, std::string_view def) const noexcept {
+std::string_view EnvFake::get_implem (std::string_view name, std::string_view def, Mutex& m) const {
 	bool ret_def{true};
+	std::lock_guard<Mutex> lock(m);
 	std::string_view maybe_ret(run_if_found(m_map, name, [&ret_def](auto& it)noexcept{ret_def=false; return it->second;}));
 	if (ret_def)
 		return def;
diff --git a/src/env_fake.hpp b/src/env_fake.hpp
index 5de66e9..ac33e7d 100644
--- a/src/env_fake.hpp
+++ b/src/env_fake.hpp
@@ -33,9 +33,6 @@ namespace duck {
 
 		EnvFake& operator= (const EnvBase& other);
 
-		virtual std::optional<std::string_view> get (std::string_view name) const noexcept override;
-		virtual std::string_view get (std::string_view name, std::string_view def) const noexcept override;
-
 		const_iterator begin() const;
 		const_iterator cbegin() const;
 		const_iterator end() const;
@@ -46,6 +43,8 @@ namespace duck {
 	protected:
 		virtual void set_all_into (EnvBase& other) const override;
 		virtual void clear_implem(Mutex& m) override;
+		virtual std::optional<std::string_view> get_implem (std::string_view name, Mutex& m) const override;
+		virtual std::string_view get_implem (std::string_view name, std::string_view def, Mutex& m) const override;
 		virtual void set_implem (std::string_view name, std::string_view value, Mutex& m) override;
 		virtual void unset_implem (std::string_view name, Mutex& m) override;
 		virtual bool is_set_implem (std::string_view name, Mutex& m) const override;
diff --git a/src/env_real.cpp b/src/env_real.cpp
index 9d6ce4e..d3ce6d3 100644
--- a/src/env_real.cpp
+++ b/src/env_real.cpp
@@ -209,16 +209,16 @@ EnvReal& EnvReal::operator= (const EnvBase& other) {
 	return *this;
 }
 
-std::optional<std::string_view> EnvReal::get (std::string_view name) const noexcept {
-	const char* const ret = this->raw_fetch_env(name);
+std::optional<std::string_view> EnvReal::get_implem (std::string_view name, Mutex& m) const {
+	const char* const ret = this->raw_fetch_env(name, m);
 	if (ret)
 		return to_string_view(ret);
 	else
 		return {};
 }
 
-std::string_view EnvReal::get (std::string_view name, std::string_view def) const noexcept {
-	const char* const ret = this->raw_fetch_env(name);
+std::string_view EnvReal::get_implem (std::string_view name, std::string_view def, Mutex& m) const {
+	const char* const ret = this->raw_fetch_env(name, m);
 	if (ret)
 		return to_string_view(ret);
 	else
@@ -298,9 +298,8 @@ void EnvReal::clear_implem(Mutex& m) {
 	}
 }
 
-const char* EnvReal::raw_fetch_env (std::string_view name) const noexcept {
-	auto& pm = pointer_map();
-	std::lock_guard<std::mutex> lock(pm.env_mutex());
+const char* EnvReal::raw_fetch_env (std::string_view name, Mutex& m) const noexcept {
+	std::lock_guard<Mutex> lock(m);
 
 	return duck::invoke_with_zstr(
 		name,
diff --git a/src/env_real.hpp b/src/env_real.hpp
index 9e61022..f61e596 100644
--- a/src/env_real.hpp
+++ b/src/env_real.hpp
@@ -54,9 +54,6 @@ namespace duck {
 
 		EnvReal& operator= (const EnvBase& other);
 
-		virtual std::optional<std::string_view> get (std::string_view name) const noexcept override;
-		virtual std::string_view get (std::string_view name, std::string_view def) const noexcept override;
-
 		const_iterator begin() const;
 		const_iterator cbegin() const;
 		const_iterator end() const;
@@ -67,13 +64,15 @@ namespace duck {
 	protected:
 		virtual void set_all_into (EnvBase& other) const override;
 		virtual void clear_implem(Mutex& m) override;
+		virtual std::optional<std::string_view> get_implem (std::string_view name, Mutex& m) const override;
+		virtual std::string_view get_implem (std::string_view name, std::string_view def, Mutex& m) const override;
 		virtual void set_implem (std::string_view name, std::string_view value, Mutex& m) override;
 		virtual void unset_implem (std::string_view name, Mutex& m) override;
 		virtual bool is_set_implem (std::string_view name, Mutex& m) const override;
 		virtual size_type size_implem(Mutex& m) const override;
 
 	private:
-		const char* raw_fetch_env (std::string_view name) const noexcept;
+		const char* raw_fetch_env (std::string_view name, Mutex& m) const noexcept;
 
 		std::unique_ptr<char[]> m_name_buff;
 		std::size_t m_name_buff_len;