diff --git a/plugins/input/raster/raster_featureset.cpp b/plugins/input/raster/raster_featureset.cpp
index 14bf4ec84..0df8262a0 100644
--- a/plugins/input/raster/raster_featureset.cpp
+++ b/plugins/input/raster/raster_featureset.cpp
@@ -50,6 +50,7 @@ raster_featureset<LookupPolicy>::raster_featureset(LookupPolicy const& policy,
       curIter_(policy_.begin()),
       endIter_(policy_.end())
 {
+    ctx_ = boost::make_shared<mapnik::context>();
 }
 
 template <typename LookupPolicy>