diff --git a/plugins/input/postgis/postgis_datasource.cpp b/plugins/input/postgis/postgis_datasource.cpp
index 39a89b540..2beefc2ff 100644
--- a/plugins/input/postgis/postgis_datasource.cpp
+++ b/plugins/input/postgis/postgis_datasource.cpp
@@ -1026,8 +1026,7 @@ boost::optional<mapnik::datasource::geometry_t> postgis_datasource::get_geometry
                     }
                     else // geometry
                     {
-                        result.reset(mapnik::datasource::Collection);
-                        return result;
+                        g_type = "";
                     }
                 }
             }