diff --git a/glibc-2.23-libcxx.patch b/glibc-2.23-libcxx.patch
index dd9e9c0..54fcf7e 100644
--- a/glibc-2.23-libcxx.patch
+++ b/glibc-2.23-libcxx.patch
@@ -44,3 +44,16 @@ Index: libcxx-3.8.0.src/test/std/depr/depr.c.headers/math_h_isinf.pass.cpp
  #include <math.h>
  #include <type_traits>
  #include <cassert>
+Index: libcxx-3.8.0.src/test/std/depr/depr.c.headers/math_h_isnan.pass.cpp
+===================================================================
+--- libcxx-3.8.0.src.orig/test/std/depr/depr.c.headers/math_h_isnan.pass.cpp
++++ libcxx-3.8.0.src/test/std/depr/depr.c.headers/math_h_isnan.pass.cpp
+@@ -11,8 +11,6 @@
+ 
+ // isnan
+ 
+-// XFAIL: linux
+-
+ #include <math.h>
+ #include <type_traits>
+ #include <cassert>