diff --git a/include/mapnik/filter_factory.hpp b/include/mapnik/filter_factory.hpp
deleted file mode 100644
index 68d729a6c..000000000
--- a/include/mapnik/filter_factory.hpp
+++ /dev/null
@@ -1,8 +0,0 @@
-// TODO - remove this file at mapnik 3.x
-#ifdef _MSC_VER
-#pragma NOTE("filter_factory.hpp" is now called "expression.hpp")
-#else
-#warning "filter_factory.hpp" is now called "expression.hpp"
-#endif
-
-#include <mapnik/expression.hpp>