diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a23830db4a5..e2dac201d41 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,8 @@
 2017-12-01  Jonathan Wakely  <jwakely@redhat.com>
 
+	* include/tr1/modified_bessel_func.tcc (__airy): Use value-init not
+	list-init.
+
 	* include/std/type_traits (integral_constant): Make member functions
 	noexcept (LWG 2346).
 	* include/std/utility (integer_sequence): Likewise.
diff --git a/libstdc++-v3/include/tr1/modified_bessel_func.tcc b/libstdc++-v3/include/tr1/modified_bessel_func.tcc
index 3910b95bd28..f39ff6c82d2 100644
--- a/libstdc++-v3/include/tr1/modified_bessel_func.tcc
+++ b/libstdc++-v3/include/tr1/modified_bessel_func.tcc
@@ -384,11 +384,11 @@ namespace tr1
         __Bip = __Aip = __Bi = __Ai = std::numeric_limits<_Tp>::quiet_NaN();
       else if (__z == _S_inf)
         {
-	  __Aip = __Ai = _Tp{0};
+	  __Aip = __Ai = _Tp(0);
 	  __Bip = __Bi = _S_inf;
 	}
       else if (__z == -_S_inf)
-	__Bip = __Aip = __Bi = __Ai = _Tp{0};
+	__Bip = __Aip = __Bi = __Ai = _Tp(0);
       else if (__x > _Tp(0))
         {
           _Tp __I_nu, __Ip_nu, __K_nu, __Kp_nu;