diff --git a/glibc-2.34567-NPTL-helgrind.supp b/glibc-2.34567-NPTL-helgrind.supp

index b61a339..ed105b8 100644

--- a/glibc-2.34567-NPTL-helgrind.supp

+++ b/glibc-2.34567-NPTL-helgrind.supp

@@ -23,6 +23,10 @@

 #   this, then loads of errors to do with stdio are reported, because

 #   H fails to see glibc's internal locking/unlocking of FILE*s

 #   as required by POSIX.  A better solution is needed.

+#

+# - some of the stdio functions in newer glibc manipulate stdio

+#   FILE*s state through mempcpy, which we intercept, so we also need

+#   to suppress such manipulations.

 #{

 #   helgrind-glibc2X-001

@@ -41,6 +45,14 @@

 }

 {

+   helgrind-glibc-io-xsputn-mempcpy

+   Helgrind:Race

+   fun:__GI_mempcpy

+   fun:_IO_*xsputn*

+   obj:*/lib*/libc-2.*so*

+}

+

+{

    helgrind-glibc2X-005

    Helgrind:Race

    obj:*/lib*/libpthread-2.*so*