diff --git a/plugins/input/shape/shape_index_featureset.cpp b/plugins/input/shape/shape_index_featureset.cpp
index e0bb79c73..1fa6f0bbf 100644
--- a/plugins/input/shape/shape_index_featureset.cpp
+++ b/plugins/input/shape/shape_index_featureset.cpp
@@ -40,15 +40,6 @@
 #include "shape_utils.hpp"
 #include <mapnik/util/spatial_index.hpp>
 
-
-// operator>> needed by mapnik::spatial_index<Value, Filter, InputStream>
-template <typename InputStream>
-InputStream & operator>>(InputStream & in, std::streampos & pos)
-{
-    in.read(reinterpret_cast<char*>(&pos), sizeof(std::streampos));
-    return in;
-}
-
 using mapnik::feature_factory;
 
 template <typename filterT>
@@ -73,10 +64,9 @@ shape_index_featureset<filterT>::shape_index_featureset(filterT const& filter,
     if (index)
     {
 #ifdef SHAPE_MEMORY_MAPPED_FILE
-        //spatial_index<unsigned, filterT,stream<mapped_file_source> >::query(filter, index->file(), offsets_);
-        mapnik::util::spatial_index<std::streampos, filterT,boost::interprocess::ibufferstream>::query(filter, index->file(), offsets_);
+        mapnik::util::spatial_index<int, filterT,boost::interprocess::ibufferstream>::query(filter, index->file(), offsets_);
 #else
-        mapnik::util::spatial_index<std::streampos, filterT, std::ifstream>::query(filter, index->file(), offsets_);
+        mapnik::util::spatial_index<int, filterT, std::ifstream>::query(filter, index->file(), offsets_);
 #endif
     }
     std::sort(offsets_.begin(), offsets_.end());
diff --git a/plugins/input/shape/shape_index_featureset.hpp b/plugins/input/shape/shape_index_featureset.hpp
index cf52aa0c2..80c8fa681 100644
--- a/plugins/input/shape/shape_index_featureset.hpp
+++ b/plugins/input/shape/shape_index_featureset.hpp
@@ -63,8 +63,8 @@ private:
     context_ptr ctx_;
     std::unique_ptr<shape_io> shape_ptr_;
     const std::unique_ptr<mapnik::transcoder> tr_;
-    std::vector<std::streampos> offsets_;
-    std::vector<std::streampos>::iterator itr_;
+    std::vector<int> offsets_;
+    std::vector<int>::iterator itr_;
     std::vector<int> attr_ids_;
     mapnik::value_integer row_limit_;
     mutable int count_;