diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 5911a297e96..eb6710f567e 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2018-09-20  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	* testsuite/26_numerics/headers/cmath/hypot-long-double.cc: Skip
+	on arm*.
+
 2018-09-19  Jonathan Wakely  <jwakely@redhat.com>
 
 	* include/bits/regex_automaton.tcc (_StateSeq<_TraitsT>::_M_clone()):
diff --git a/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot-long-double.cc b/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot-long-double.cc
index 8a054735ce9..bcc1fec635b 100644
--- a/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot-long-double.cc
+++ b/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot-long-double.cc
@@ -17,7 +17,7 @@
 
 // { dg-options "-std=gnu++17" }
 // { dg-do run { target c++17 } }
-// { dg-xfail-run-if "PR 78179" { powerpc-ibm-aix* hppa-*-linux* nios2-*-* } }
+// { dg-xfail-run-if "PR 78179" { arm*-*-* hppa-*-linux* nios2-*-* powerpc-ibm-aix* } }
 
 // Run the long double tests from hypot.cc separately, because they fail on a
 // number of targets. See PR libstdc++/78179 for details.