diff --git a/src/grib_iterator_class_unstructured.cc b/src/grib_iterator_class_unstructured.cc
index 44ae69eb7..f7b4dcb99 100644
--- a/src/grib_iterator_class_unstructured.cc
+++ b/src/grib_iterator_class_unstructured.cc
@@ -144,4 +144,4 @@ static grib_iterator_class _grib_iterator_class_unstructured = {
 };
 
 
-grib_iterator_class* grib_iterator_class_unstructured = &_grib_iterator_class_unstructured;
+auto* grib_iterator_class_unstructured = &_grib_iterator_class_unstructured;