diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
index 097ed72..25bdd08 100644
--- a/Doc/tut/tut.tex
+++ b/Doc/tut/tut.tex
@@ -3429,7 +3429,7 @@
 class MyClass:
     "A simple example class"
     i = 12345
-    def f(x):
+    def f(self):
         return 'hello world'
 \end{verbatim}