diff --git a/region.cpp b/region.cpp
index 50a43b2d..06e84f89 100644
--- a/region.cpp
+++ b/region.cpp
@@ -38,6 +38,19 @@ util::region<T>::region (point<2,T> _point,
 { ; }
 
 
+//-----------------------------------------------------------------------------
+template <typename T>
+util::region<T>::region (point<2,T> _a,
+                         point<2,T> _b):
+    x (_a.x),
+    y (_a.y),
+    w (_b.x - _a.x),
+    h (_b.y - _a.y)
+{
+    CHECK_GE (_b.x, _a.x);
+    CHECK_GE (_b.y, _a.y);
+}
+
 //-----------------------------------------------------------------------------
 template <typename T>
 util::region<T>::region (position_type _x,
diff --git a/region.hpp b/region.hpp
index 73c9d7f9..b1d202ce 100644
--- a/region.hpp
+++ b/region.hpp
@@ -43,6 +43,7 @@ namespace util {
 
         region () = default;
         region (util::point<2,T>, util::extent<size_type>);
+        region (util::point<2,T>, util::point<2,T>);
         region (T _x, T _y, size_type _w, size_type _h);
 
         size_type area     (void) const;