diff --git a/chapter06/gcc.xml b/chapter06/gcc.xml
index 834331a2c..dd88522bd 100644
--- a/chapter06/gcc.xml
+++ b/chapter06/gcc.xml
@@ -76,7 +76,7 @@ cd ../gcc-build</userinput></screen>
 <screen><userinput remap="configure">../gcc-&gcc-version;/configure --prefix=/usr            \
                        --libexecdir=/usr/lib    \
                        --enable-shared          \
-                       --enable-threads=posix   \ 
+                       --enable-threads=posix   \
                        --enable-__cxa_atexit    \
                        --enable-clocale=gnu     \
                        --enable-languages=c,c++ \