diff --git a/src/freedombone b/src/freedombone
index fb1b1031..6a58f2b6 100755
--- a/src/freedombone
+++ b/src/freedombone
@@ -8621,7 +8621,7 @@ function install_gnu_social_theme {
 
     microblog_config_file=/var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php
     if ! grep -q "addPlugin('Qvitter')" $microblog_config_file; then
-        MICROBLOG_WELCOME_MESSAGE=$(echo $MICROBLOG_WELCOME_MESSAGE | sed 's|\$MICROBLOG_DOMAIN_NAME|$MICROBLOG_DOMAIN_NAME|g')
+        MICROBLOG_WELCOME_MESSAGE=$(echo $MICROBLOG_WELCOME_MESSAGE | sed "s|\$MICROBLOG_DOMAIN_NAME|$MICROBLOG_DOMAIN_NAME|g")
         echo "" >> $microblog_config_file
         echo "// Qvitter settings" >> $microblog_config_file
         echo "addPlugin('Qvitter');" >> $microblog_config_file