$OpenBSD$
--- source/utils/Helper.h.orig	Wed Jan 18 09:19:18 2017
+++ source/utils/Helper.h	Wed Jan 18 09:19:09 2017
@@ -138,6 +138,7 @@ namespace Helper
     std::string toString(uint32_t d);
     std::string toString(int64_t d);
     std::string toString(uint64_t d);
+    std::string toString(size_t d);
     std::string toString(const Ogre::Vector3& v);
     std::string toStringWithoutZ(const Ogre::Vector3& v);
     std::string toString(const Ogre::ColourValue& c);
