diff --git a/libstdc++-v3/include/bits/semaphore_base.h b/libstdc++-v3/include/bits/semaphore_base.h
index 0692f95f24f21835993ad63e37cdfa02708c56ba..56333bbbfef7179c5b37d5592c158d8c46b2b4a3 100644
--- a/libstdc++-v3/include/bits/semaphore_base.h
+++ b/libstdc++-v3/include/bits/semaphore_base.h
@@ -141,7 +141,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	else
 	  {
 	    const typename _Clock::time_point __c_entry = _Clock::now();
-	    const __clock_t __s_entry = __clock_t::now();
+	    const auto __s_entry = __clock_t::now();
 	    const auto __delta = __atime - __c_entry;
 	    const auto __s_atime = __s_entry + __delta;
 	    if (_M_try_acquire_until_impl(__s_atime))