diff --git a/plugins/input/postgis/postgis_featureset.cpp b/plugins/input/postgis/postgis_featureset.cpp
index dee82a2f3..d022f3559 100644
--- a/plugins/input/postgis/postgis_featureset.cpp
+++ b/plugins/input/postgis/postgis_featureset.cpp
@@ -117,12 +117,17 @@ feature_ptr postgis_featureset::next()
             ++feature_id_;
         }
 
+        // null geometry is not acceptable
         if (rs_->isNull(0))
+        {
+            MAPNIK_LOG_WARN(postgis) << "postgis_featureset: null value encountered for geometry";
             continue;
+        }
 
+        // parse geometry
         int size = rs_->getFieldLength(0);
         const char *data = rs_->getValue(0);
-        // parse geometry
+
         if (geometry_utils::from_wkb(feature->paths(), data, size))
             continue;