diff --git a/components/ogreplugin/ogreplugin.cpp b/components/ogreplugin/ogreplugin.cpp
index ce61f344dd..329cd1ea97 100644
--- a/components/ogreplugin/ogreplugin.cpp
+++ b/components/ogreplugin/ogreplugin.cpp
@@ -5,7 +5,7 @@
 
 #include <boost/filesystem.hpp>
 
-bool loadOgrePlugin(std::string pluginDir, std::string pluginName, Ogre::Root &ogreRoot) {
+bool loadOgrePlugin(const std::string &pluginDir, std::string pluginName, Ogre::Root &ogreRoot) {
 	pluginName = pluginName + OGRE_PLUGIN_DEBUG_SUFFIX;
 #if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
 	std::ostringstream verStream;
diff --git a/components/ogreplugin/ogreplugin.h b/components/ogreplugin/ogreplugin.h
index bb1ea04e19..d9b00e576d 100644
--- a/components/ogreplugin/ogreplugin.h
+++ b/components/ogreplugin/ogreplugin.h
@@ -7,6 +7,6 @@ namespace Ogre {
 	class Root;
 }
 
-extern bool loadOgrePlugin(std::string pluginDir, std::string pluginName, Ogre::Root &ogreRoot);
+extern bool loadOgrePlugin(const std::string &pluginDir, std::string pluginName, Ogre::Root &ogreRoot);
 
 #endif
\ No newline at end of file