diff --git a/src/agg/process_raster_symbolizer.cpp b/src/agg/process_raster_symbolizer.cpp
index 959a2e8be..af1329b96 100644
--- a/src/agg/process_raster_symbolizer.cpp
+++ b/src/agg/process_raster_symbolizer.cpp
@@ -29,6 +29,7 @@
 #include <mapnik/raster.hpp>
 #include <mapnik/box2d.hpp>
 #include <mapnik/warp.hpp>
+#include <mapnik/config.hpp>
 
 // stl
 #include <cmath>
diff --git a/src/cairo_renderer.cpp b/src/cairo_renderer.cpp
index bec48966c..3f69f38d5 100644
--- a/src/cairo_renderer.cpp
+++ b/src/cairo_renderer.cpp
@@ -38,6 +38,7 @@
 #include <mapnik/segment.hpp>
 #include <mapnik/expression_evaluator.hpp>
 #include <mapnik/warp.hpp>
+#include <mapnik/config.hpp>
 
 // cairo
 #include <cairomm/context.h>