diff --git a/plugins/input/postgis/postgis_datasource.cpp b/plugins/input/postgis/postgis_datasource.cpp
index 3b8757892..28a77cba8 100644
--- a/plugins/input/postgis/postgis_datasource.cpp
+++ b/plugins/input/postgis/postgis_datasource.cpp
@@ -89,7 +89,6 @@ postgis_datasource::postgis_datasource(parameters const& params)
     // See https://github.com/mapnik/mapnik/issues/1639
     // See http://trac.osgeo.org/postgis/ticket/2093
     simplify_dp_ratio_(*params_.get<mapnik::value_double>("simplify_dp_ratio", 1.0 / 20.0))
-    , simplify_prefilter_(*params_.get<mapnik::value_double>("simplify_prefilter", 0.0))
     , simplify_dp_preserve_(false)
     , simplify_clip_resolution_(*params_.get<mapnik::value_double>("simplify_clip_resolution", 0.0))
     , re_tokens_("!(@?\\w+)!")
diff --git a/plugins/input/postgis/postgis_datasource.hpp b/plugins/input/postgis/postgis_datasource.hpp
index 96cfb0b7d..8e97ba5c7 100644
--- a/plugins/input/postgis/postgis_datasource.hpp
+++ b/plugins/input/postgis/postgis_datasource.hpp
@@ -126,7 +126,6 @@ class postgis_datasource : public datasource
     mapnik::value_double twkb_rounding_adjustment_;
     mapnik::value_double simplify_snap_ratio_;
     mapnik::value_double simplify_dp_ratio_;
-    mapnik::value_double simplify_prefilter_;
     bool simplify_dp_preserve_;
     mapnik::value_double simplify_clip_resolution_;
     std::regex re_tokens_;