diff --git a/chapter06/gdbm.xml b/chapter06/gdbm.xml
index 544cb4365..ccb4ef1ba 100644
--- a/chapter06/gdbm.xml
+++ b/chapter06/gdbm.xml
@@ -46,7 +46,7 @@
 
     <para>Prepare GDBM for compilation:</para>
 
-<screen><userinput remap="configure">./configure --prefix=/usr \
+<screen><userinput remap="configure">./configure --prefix=/usr    \
             --disable-static \
             --enable-libgdbm-compat</userinput></screen>