diff --git a/chapter06/file.xml b/chapter06/file.xml
index 5f68df499..dc6024177 100644
--- a/chapter06/file.xml
+++ b/chapter06/file.xml
@@ -51,7 +51,7 @@
 
 <screen><userinput remap="pre">mkdir build
 pushd build
-  ../configure --disable-bzlib      \ 
+  ../configure --disable-bzlib      \
                --disable-libseccomp \
                --disable-xzlib      \
                --disable-zlib