diff --git a/libcxx/include/__chrono/convert_to_tm.h b/libcxx/include/__chrono/convert_to_tm.h
index 0974e9466601b0..36846b3f714042 100644
--- a/libcxx/include/__chrono/convert_to_tm.h
+++ b/libcxx/include/__chrono/convert_to_tm.h
@@ -109,11 +109,11 @@ _LIBCPP_HIDE_FROM_ABI _Tm __convert_to_tm(const _ChronoT& __value) {
     __result.tm_year = static_cast<int>(__value.year()) - 1900;
     __result.tm_mon  = static_cast<unsigned>(__value.month()) - 1;
   } else if constexpr (same_as<_ChronoT, chrono::year_month_day> || same_as<_ChronoT, chrono::year_month_day_last>) {
-    return __convert_to_tm<_Tm>(
+    return std::__convert_to_tm<_Tm>(
         chrono::year_month_day{__value}, chrono::weekday{static_cast<chrono::sys_days>(__value)});
   } else if constexpr (same_as<_ChronoT, chrono::year_month_weekday> ||
                        same_as<_ChronoT, chrono::year_month_weekday_last>) {
-    return __convert_to_tm<_Tm>(chrono::year_month_day{static_cast<chrono::sys_days>(__value)}, __value.weekday());
+    return std::__convert_to_tm<_Tm>(chrono::year_month_day{static_cast<chrono::sys_days>(__value)}, __value.weekday());
   } else
     static_assert(sizeof(_ChronoT) == 0, "Add the missing type specialization");
 
diff --git a/libcxx/include/mutex b/libcxx/include/mutex
index 5c7c332180bf8f..9b726d59b10596 100644
--- a/libcxx/include/mutex
+++ b/libcxx/include/mutex
@@ -681,7 +681,7 @@ call_once(once_flag& __flag, _Callable& __func)
     if (__libcpp_acquire_load(&__flag.__state_) != ~once_flag::_State_type(0))
     {
         __call_once_param<_Callable> __p(__func);
-        __call_once(__flag.__state_, &__p, &__call_once_proxy<_Callable>);
+		std::__call_once(__flag.__state_, &__p, &__call_once_proxy<_Callable>);
     }
 }
 
@@ -693,7 +693,7 @@ call_once(once_flag& __flag, const _Callable& __func)
     if (__libcpp_acquire_load(&__flag.__state_) != ~once_flag::_State_type(0))
     {
         __call_once_param<const _Callable> __p(__func);
-        __call_once(__flag.__state_, &__p, &__call_once_proxy<const _Callable>);
+		std::__call_once(__flag.__state_, &__p, &__call_once_proxy<const _Callable>);
     }
 }