diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
index 56dd395..1c9b0bc 100644
--- a/Doc/tut/tut.tex
+++ b/Doc/tut/tut.tex
@@ -1420,8 +1420,8 @@
 def ask_ok(prompt, retries=4, complaint='Yes or no, please!'):
     while True:
         ok = raw_input(prompt)
-        if ok in ('y', 'ye', 'yes'): return 1
-        if ok in ('n', 'no', 'nop', 'nope'): return 0
+        if ok in ('y', 'ye', 'yes'): return True
+        if ok in ('n', 'no', 'nop', 'nope'): return False
         retries = retries - 1
         if retries < 0: raise IOError, 'refusenik user'
         print complaint