diff --git a/region.hpp b/region.hpp
index 95502229..15e3c0d2 100644
--- a/region.hpp
+++ b/region.hpp
@@ -90,6 +90,7 @@ namespace util {
     };
 
     typedef region<size_t> region2u;
+    typedef region<float>  region2f;
 
     template <typename T>
     std::ostream& operator<< (std::ostream&, const util::region<T>&);