diff --git a/bindings/python/mapnik_markers_symbolizer.cpp b/bindings/python/mapnik_markers_symbolizer.cpp
index 260db15e3..64f6bc394 100644
--- a/bindings/python/mapnik_markers_symbolizer.cpp
+++ b/bindings/python/mapnik_markers_symbolizer.cpp
@@ -23,6 +23,7 @@
 #include <boost/python.hpp>
 
 #include <mapnik/graphics.hpp>
+#include <mapnik/expression_node.hpp>
 #include <mapnik/value_error.hpp>
 #include <mapnik/image_util.hpp>
 #include <mapnik/markers_symbolizer.hpp>
diff --git a/include/mapnik/datasource.hpp b/include/mapnik/datasource.hpp
index 6ff92ae73..009c3729a 100644
--- a/include/mapnik/datasource.hpp
+++ b/include/mapnik/datasource.hpp
@@ -33,6 +33,7 @@
 
 // boost
 #include <boost/shared_ptr.hpp>
+#include <boost/optional.hpp>
 
 // stl
 #include <map>