diff --git a/include/mapnik/box2d.hpp b/include/mapnik/box2d.hpp
index 6688fa94f..41909e677 100644
--- a/include/mapnik/box2d.hpp
+++ b/include/mapnik/box2d.hpp
@@ -67,6 +67,10 @@ public:
     T miny() const;
     T maxx() const;
     T maxy() const;
+    void set_minx(T v);
+    void set_miny(T v);
+    void set_maxx(T v);
+    void set_maxy(T v);
     T width() const;
     T height() const;
     void width(T w);
diff --git a/src/box2d.cpp b/src/box2d.cpp
index de767ac35..b7fbdb3b2 100644
--- a/src/box2d.cpp
+++ b/src/box2d.cpp
@@ -128,6 +128,30 @@ T box2d<T>::maxy() const
     return maxy_;
 }
 
+template<typename T>
+void box2d<T>::set_minx(T v)
+{
+    minx_ = v;
+}
+
+template<typename T>
+void box2d<T>::set_miny(T v)
+{
+    miny_ = v;
+}
+
+template<typename T>
+void box2d<T>::set_maxx(T v)
+{
+    maxx_ = v;
+}
+
+template<typename T>
+void box2d<T>::set_maxy(T v)
+{
+    maxy_ = v;
+}
+
 template <typename T>
 #if !defined(__SUNPRO_CC)
 inline