diff --git a/include/matador/query/insert_query_builder.hpp b/include/matador/query/insert_query_builder.hpp
index 341d232..7d01350 100644
--- a/include/matador/query/insert_query_builder.hpp
+++ b/include/matador/query/insert_query_builder.hpp
@@ -106,7 +106,7 @@ public:
 
       // Extract FK value from the foreign object
       insert_step rel_step{};
-      const auto pk = rel_step.pk_accessor.get(obj);
+      const auto pk = rel_step.pk_accessor.get(*obj);
       if (pk.is_valid()) {
         continue;
       }