diff --git a/cql3/sets.cc b/cql3/sets.cc
index 41e1d99763..1a1517e9fa 100644
--- a/cql3/sets.cc
+++ b/cql3/sets.cc
@@ -300,7 +300,7 @@ sets::adder::do_add(mutation& m, const clustering_key_prefix& row_key, const upd
         m.set_cell(row_key, column, mut.serialize(*set_type));
     } else if (set_value != nullptr) {
         // for frozen sets, we're overwriting the whole cell
-        auto v = set_type->serialize_partially_deserialized_form(
+        auto v = set_type_impl::serialize_partially_deserialized_form(
                 {set_value->_elements.begin(), set_value->_elements.end()},
                 cql_serialization_format::internal());
         m.set_cell(row_key, column, params.make_cell(*column.type, fragmented_temporary_buffer::view(v)));
diff --git a/types.cc b/types.cc
index 380627f3f2..5206908a4c 100644
--- a/types.cc
+++ b/types.cc
@@ -1196,7 +1196,7 @@ set_type_impl::deserialize(bytes_view in, cql_serialization_format sf) const {
 
 bytes
 set_type_impl::serialize_partially_deserialized_form(
-        const std::vector<bytes_view>& v, cql_serialization_format sf) const {
+        const std::vector<bytes_view>& v, cql_serialization_format sf) {
     return pack(v.begin(), v.end(), v.size(), sf);
 }
 
diff --git a/types/set.hh b/types/set.hh
index a606613560..c7d0e016b9 100644
--- a/types/set.hh
+++ b/types/set.hh
@@ -48,8 +48,8 @@ public:
     virtual bool is_value_compatible_with_frozen(const collection_type_impl& previous) const override;
     using abstract_type::deserialize;
     virtual data_value deserialize(bytes_view v, cql_serialization_format sf) const override;
-    bytes serialize_partially_deserialized_form(
-            const std::vector<bytes_view>& v, cql_serialization_format sf) const;
+    static bytes serialize_partially_deserialized_form(
+            const std::vector<bytes_view>& v, cql_serialization_format sf);
 };
 
 data_value make_set_value(data_type tuple_type, set_type_impl::native_type value);