diff --git a/chapter08/glibc.xml b/chapter08/glibc.xml
index a0d64ee75..ec81b2da7 100644
--- a/chapter08/glibc.xml
+++ b/chapter08/glibc.xml
@@ -50,6 +50,12 @@
 
 <screen><userinput remap="pre">patch -Np1 -i ../&glibc-fhs-patch;</userinput></screen>
 
+    <!-- https://sourceware.org/bugzilla/show_bug.cgi?id=30068 -->
+    <para>Fix an issue identified upstream:</para>
+
+<screen><userinput remap="pre">sed '/width -=/s/workend - string/number_length/' \
+    -i stdio-common/vfprintf-process-arg.c</userinput></screen>
+
     <para>The Glibc documentation recommends building Glibc
     in a dedicated build directory:</para>