diff --git a/include/mapnik/raster_colorizer.hpp b/include/mapnik/raster_colorizer.hpp
index e496c2400..86a85def2 100644
--- a/include/mapnik/raster_colorizer.hpp
+++ b/include/mapnik/raster_colorizer.hpp
@@ -165,7 +165,7 @@ public:
 
     void set_default_mode(colorizer_mode mode)
     {
-        default_mode_ = (mode == COLORIZER_INHERIT) ? COLORIZER_LINEAR:(colorizer_mode_enum)mode;
+        default_mode_ = (mode == COLORIZER_INHERIT) ? COLORIZER_LINEAR : static_cast<colorizer_mode_enum>(mode);
     }
 
     void set_default_mode_enum(colorizer_mode_enum mode) { set_default_mode(mode); }
diff --git a/include/mapnik/simplify_converter.hpp b/include/mapnik/simplify_converter.hpp
index 92f81b461..248842504 100644
--- a/include/mapnik/simplify_converter.hpp
+++ b/include/mapnik/simplify_converter.hpp
@@ -41,7 +41,7 @@ struct weighted_vertex : private util::noncopyable
         vertex2d const& A = prev->coord;
         vertex2d const& B = next->coord;
         vertex2d const& C = coord;
-        return std::abs((double)((A.x - C.x) * (B.y - A.y) - (A.x - B.x) * (C.y - A.y))) / 2.0;
+        return std::abs(static_cast<double>((A.x - C.x) * (B.y - A.y) - (A.x - B.x) * (C.y - A.y))) / 2.0;
     }
 
     struct ascending_sort