diff --git a/cql3/selection/selector.hh b/cql3/selection/selector.hh
index f0e326786b..e6ff4d39cd 100644
--- a/cql3/selection/selector.hh
+++ b/cql3/selection/selector.hh
@@ -105,9 +105,11 @@ public:
     virtual void reset() = 0;
 
     virtual assignment_testable::test_result test_assignment(database& db, const sstring& keyspace, ::shared_ptr<column_specification> receiver) override {
-        if (receiver->type == get_type()) {
+        auto t1 = receiver->type->underlying_type();
+        auto t2 = get_type()->underlying_type();
+        if (t1 == t2) {
             return assignment_testable::test_result::EXACT_MATCH;
-        } else if (receiver->type->is_value_compatible_with(*get_type())) {
+        } else if (t1->is_value_compatible_with(*t2)) {
             return assignment_testable::test_result::WEAKLY_ASSIGNABLE;
         } else {
             return assignment_testable::test_result::NOT_ASSIGNABLE;