diff --git a/chapter07/functions.xml b/chapter07/functions.xml
index f9514f2c7..e62d75afd 100644
--- a/chapter07/functions.xml
+++ b/chapter07/functions.xml
@@ -36,9 +36,9 @@ FAILURE="echo -en \\033[1;31m"
 
 evaluate_retval()
 {
-	if [ $? = 0 ]
+        if [ $? = 0 ]
         then
-		print_status success
+                print_status success
         else
                 print_status failure
         fi