diff --git a/plugins/input/postgis/postgis_datasource.cpp b/plugins/input/postgis/postgis_datasource.cpp
index 5bfce1f73..c5d7da7d5 100644
--- a/plugins/input/postgis/postgis_datasource.cpp
+++ b/plugins/input/postgis/postgis_datasource.cpp
@@ -563,7 +563,7 @@ featureset_ptr postgis_datasource::features_at_point(coord2d const& pt) const
             }
                     
 
-            s << "SELECT AsBinary(\"" << geometryColumn_ << "\") AS geom";
+            s << "SELECT ST_AsBinary(\"" << geometryColumn_ << "\") AS geom";
             
             if (!key_field_.empty())
                 mapnik::quote_attr(s,key_field_);