diff --git a/develop/singles/headers/meta.hpp/meta_all.hpp b/develop/singles/headers/meta.hpp/meta_all.hpp
index 5afb106..08e3c1e 100644
--- a/develop/singles/headers/meta.hpp/meta_all.hpp
+++ b/develop/singles/headers/meta.hpp/meta_all.hpp
@@ -1909,7 +1909,7 @@ namespace meta_hpp::detail
                 flags.set(class_flags::is_polymorphic);
             }
 
-            if constexpr ( type_list_arity_v<argument_types> ) {
+            if constexpr ( type_list_arity_v<argument_types> > 0 ) {
                 flags.set(class_flags::is_template_instantiation);
             }
 
diff --git a/headers/meta.hpp/meta_detail/type_traits/class_traits.hpp b/headers/meta.hpp/meta_detail/type_traits/class_traits.hpp
index 428c26d..ff4e6b7 100644
--- a/headers/meta.hpp/meta_detail/type_traits/class_traits.hpp
+++ b/headers/meta.hpp/meta_detail/type_traits/class_traits.hpp
@@ -296,7 +296,7 @@ namespace meta_hpp::detail
                 flags.set(class_flags::is_polymorphic);
             }
 
-            if constexpr ( type_list_arity_v<argument_types> ) {
+            if constexpr ( type_list_arity_v<argument_types> > 0 ) {
                 flags.set(class_flags::is_template_instantiation);
             }