diff --git a/CHANGES.txt b/CHANGES.txt
index 5836412..4d8afb8 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -4,9 +4,14 @@ Changelog
 1.0b1 - 2010-06-02
 ------------------
 
+* Fix _generate_words method. The "nowish" variable tells us in which 5 minutes 
+  slot we are in. Therefore we increment the time slot by 1, not by 5 (minutes).  
+  [tbesluau]
+
 * Declare that plone.formwidget.captcha provides a Captcha field that can be 
   used by plone.app.discussion to add a Captcha field to comment forms.
-  [timo] 
+  [timo]
+
          
 1.0a2 - 2010-01-28
 ------------------
diff --git a/plone/formwidget/captcha/browser/captcha.py b/plone/formwidget/captcha/browser/captcha.py
index ddbc6a1..f6e647e 100644
--- a/plone/formwidget/captcha/browser/captcha.py
+++ b/plone/formwidget/captcha/browser/captcha.py
@@ -74,9 +74,13 @@ class Captcha(BrowserView):
         """
         session = self.request[COOKIE_ID]
         nowish = _TEST_TIME or int(time.time() / 300)
+        # The line above defines nowish, which tells us what five minutes slot 
+        # we're in. Indeed, every second, int(time.time()) increments by 1, so
+        # int(time.time() / 300) will increment by 1 every 5 minutes.
         secret = getUtility(IKeyManager).secret()
         seeds = [sha.new(secret + session + str(nowish)).digest(),
-                 sha.new(secret + session + str(nowish - 5)).digest()]
+                 sha.new(secret + session + str(nowish - 1)).digest()]
+        # The line above generates a seed based on the "nowish" of 5 minutes ago.
         
         words = []
         for seed in seeds: