diff --git a/chapter06/libcap.xml b/chapter06/libcap.xml
index 74704650d..8126dfaae 100644
--- a/chapter06/libcap.xml
+++ b/chapter06/libcap.xml
@@ -71,7 +71,7 @@
 
     <para>Install the package and do some cleanup:</para>
 
-<screen><userinput remap="install">make lib=lib install
+<screen><userinput remap="install">make lib=lib PKGCONFIGDIR=/usr/lib/pkgconfig install
 chmod -v 755 /lib/libcap.so.&libcap-version;
 mv -v /lib/libpsx.a /usr/lib
 rm -v /lib/libcap.so