diff --git a/chapter06/xz.xml b/chapter06/xz.xml
index 6a4fbe708..cd27b29a4 100644
--- a/chapter06/xz.xml
+++ b/chapter06/xz.xml
@@ -49,7 +49,7 @@
             --host=$LFS_TGT                   \
             --build=$(build-aux/config.guess) \
             --disable-static                  \
-            ac_cv_prog_FILECMD=file           \
+            FILECMD=file                      \
             --docdir=/usr/share/doc/xz-&xz-version;</userinput></screen>
 
     <variablelist>
diff --git a/chapter08/xz.xml b/chapter08/xz.xml
index 099caa2da..a7302fceb 100644
--- a/chapter08/xz.xml
+++ b/chapter08/xz.xml
@@ -52,7 +52,7 @@
 
 <screen><userinput remap="configure">./configure --prefix=/usr    \
             --disable-static \
-            ac_cv_prog_FILECMD=file \
+            FILECMD=file     \
             --docdir=/usr/share/doc/xz-&xz-version;</userinput></screen>
 
     <para>Compile the package:</para>