diff --git a/include/ylt/reflection/member_names.hpp b/include/ylt/reflection/member_names.hpp
index e4a8c7bb2..cf53e5b3a 100644
--- a/include/ylt/reflection/member_names.hpp
+++ b/include/ylt/reflection/member_names.hpp
@@ -299,7 +299,7 @@ inline constexpr size_t index_of(std::string_view name) {
   return arr.size();
 }
 
-#if __has_include(<concetps>)
+#if __cplusplus >= 202002L
 template <typename T, FixedString name>
 inline constexpr size_t index_of() {
   return index_of<T>(name.str());
diff --git a/include/ylt/reflection/member_value.hpp b/include/ylt/reflection/member_value.hpp
index f1b85b1d0..dbdafbabe 100644
--- a/include/ylt/reflection/member_value.hpp
+++ b/include/ylt/reflection/member_value.hpp
@@ -156,7 +156,7 @@ inline constexpr auto& get(T& t) {
   return std::get<index>(ref_tp);
 }
 
-#if __has_include(<concetps>)
+#if __cplusplus >= 202002L
 template <FixedString name, typename T>
 inline constexpr auto& get(T& t) {
   constexpr size_t index = index_of<T, name>();
@@ -257,7 +257,7 @@ inline constexpr void for_each(T&& t, Visit&& func) {
 
 #if (defined(__GNUC__) && __GNUC__ > 10) || \
     ((defined(__clang__) || defined(_MSC_VER)) && __has_include(<concepts>))
-#if __has_include(<concetps>)
+#if __cplusplus >= 202002L
 template <ylt::reflection::FixedString s>
 inline constexpr auto operator""_ylts() {
   return s;
diff --git a/src/reflection/tests/test_reflection.cpp b/src/reflection/tests/test_reflection.cpp
index 598732801..fb5cb939e 100644
--- a/src/reflection/tests/test_reflection.cpp
+++ b/src/reflection/tests/test_reflection.cpp
@@ -83,7 +83,7 @@ void test_pt() {
   static_assert(y == 4);
   CHECK(y == 4);
 
-#if __has_include(<concetps>)
+#if __cplusplus >= 202002L
   constexpr auto x = get<"x"_ylts>(pt);
   static_assert(x == 2);
 #endif
@@ -118,7 +118,7 @@ TEST_CASE("test member value") {
   auto& age1 = get<int>(p, "age");
   CHECK(age1 == 6);
 
-#if __has_include(<concetps>)
+#if __cplusplus >= 202002L
   auto& age2 = get<"age"_ylts>(p);
   CHECK(age2 == 6);
 
@@ -178,7 +178,7 @@ TEST_CASE("test member value") {
   constexpr std::string_view name2 = name_of<simple>(2);
   CHECK(name2 == "str");
 
-#if __has_include(<concetps>)
+#if __cplusplus >= 202002L
   constexpr size_t idx = index_of<simple, "str"_ylts>();
   CHECK(idx == 2);
 
@@ -359,7 +359,7 @@ TEST_CASE("test macros") {
   auto var = get(t, 3);
   CHECK(*std::get<3>(var) == 6);
 
-#if __has_include(<concetps>)
+#if __cplusplus >= 202002L
   auto& age2 = get<"age"_ylts>(t);
   CHECK(age2 == 6);
 
diff --git a/src/struct_pb/examples/main.cpp b/src/struct_pb/examples/main.cpp
index 0c440175a..c0fd83dde 100644
--- a/src/struct_pb/examples/main.cpp
+++ b/src/struct_pb/examples/main.cpp
@@ -27,7 +27,8 @@ struct person {
   std::string name;
   int age;
 };
-#if __cplusplus >= 202002L
+
+#if __GNUC__ < 11 || __cplusplus < 202002L
 YLT_REFL(person, id, name, age);
 #endif