diff --git a/v2/doc/src/advanced.xml b/v2/doc/src/advanced.xml
index 868893904..967029076 100644
--- a/v2/doc/src/advanced.xml
+++ b/v2/doc/src/advanced.xml
@@ -133,9 +133,9 @@ a = $(b) $(c) ;
rule example
(
parameter1 :
- parameter2 ? :
- parameter3 + :
- parameter4 *
+ parameter2 ? :
+ parameter3 + :
+ parameter4 *
)
{
// body