diff --git a/Chapter20/listing20-6.py b/Chapter20/listing20-6.py
index fdf3e03..d0926c7 100644
--- a/Chapter20/listing20-6.py
+++ b/Chapter20/listing20-6.py
@@ -23,11 +23,11 @@ def parse(self, file):
         for block in blocks(file):
             for filter in self.filters:
                 block = filter(block, self.handler)
-                for rule in self.rules:
-                    if rule.condition(block):
-                        last = rule.action(block,
-                               self.handler)
-                        if last: break
+            for rule in self.rules:
+                if rule.condition(block):
+                    last = rule.action(block,
+                           self.handler)
+                    if last: break
         self.handler.end('document')
 
 class BasicTextParser(Parser):
@@ -49,4 +49,4 @@ def __init__(self, handler):
 handler = HTMLRenderer()
 parser = BasicTextParser(handler)
 
-parser.parse(sys.stdin)
\ No newline at end of file
+parser.parse(sys.stdin)