diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 21404f16bfa..08d92292969 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2016-12-01  David Edelsohn  <dje.gcc@gmail.com>
+
+	* testsuite/26_numerics/headers/cmath/hypot.cc: XFAIL on AIX.
+
 2016-12-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
 
 	Implement LWG 2766,
diff --git a/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot.cc b/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot.cc
index ad9e77ef4e0..b4df3bae1b7 100644
--- a/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot.cc
+++ b/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot.cc
@@ -17,6 +17,7 @@
 
 // { dg-options "-std=gnu++17" }
 // { dg-do run { target c++1z } }
+// { dg-xfail-run-if "AIX long double" { powerpc-ibm-aix* } }
 
 #include <cmath>
 #include <type_traits>