diff --git a/include/chrono b/include/chrono
index 53e4546..c8aab5d 100644
--- a/include/chrono
+++ b/include/chrono
@@ -2308,8 +2308,8 @@
 year_month_day
 year_month_day::__from_days(days __d) noexcept
 {
-    static_assert(std::numeric_limits<unsigned>::digits >= 18, "");
-    static_assert(std::numeric_limits<int>::digits >= 20     , "");
+    static_assert(numeric_limits<unsigned>::digits >= 18, "");
+    static_assert(numeric_limits<int>::digits >= 20     , "");
     const int      __z = __d.count() + 719468;
     const int      __era = (__z >= 0 ? __z : __z - 146096) / 146097;
     const unsigned __doe = static_cast<unsigned>(__z - __era * 146097);              // [0, 146096]
@@ -2325,8 +2325,8 @@
 // https://howardhinnant.github.io/date_algorithms.html#days_from_civil
 inline constexpr days year_month_day::__to_days() const noexcept
 {
-    static_assert(std::numeric_limits<unsigned>::digits >= 18, "");
-    static_assert(std::numeric_limits<int>::digits >= 20     , "");
+    static_assert(numeric_limits<unsigned>::digits >= 18, "");
+    static_assert(numeric_limits<int>::digits >= 20     , "");
 
     const int      __yr  = static_cast<int>(__y) - (__m <= February);
     const unsigned __mth = static_cast<unsigned>(__m);