diff --git a/Frameworks/io/src/environment.cc b/Frameworks/io/src/environment.cc
index bdf1ea9f..2b059774 100644
--- a/Frameworks/io/src/environment.cc
+++ b/Frameworks/io/src/environment.cc
@@ -40,10 +40,20 @@ namespace oak
 		return res;
 	}
 
-	std::map<std::string, std::string> const& basic_environment ()
+	std::map<std::string, std::string>& rw_environment ()
 	{
-		static std::map<std::string, std::string> const* environment = new std::map<std::string, std::string>(setup_basic_environment());
+		static std::map<std::string, std::string>* environment = new std::map<std::string, std::string>(setup_basic_environment());
 		return *environment;
 	}
 
+	std::map<std::string, std::string> const& basic_environment ()
+	{
+		return rw_environment();
+	}
+
+	void set_basic_environment (std::map<std::string, std::string> const& newEnvironment)
+	{
+		rw_environment() = newEnvironment;
+	}
+
 } /* io */
\ No newline at end of file
diff --git a/Frameworks/io/src/environment.h b/Frameworks/io/src/environment.h
index b4199563..3a8de94f 100644
--- a/Frameworks/io/src/environment.h
+++ b/Frameworks/io/src/environment.h
@@ -6,6 +6,7 @@
 namespace oak
 {
 	PUBLIC std::map<std::string, std::string> const& basic_environment ();
+	PUBLIC void set_basic_environment (std::map<std::string, std::string> const& newEnvironment);
 
 } /* io */