diff --git a/Doc/tut.tex b/Doc/tut.tex
index f20d77c..55ff36f 100644
--- a/Doc/tut.tex
+++ b/Doc/tut.tex
@@ -2864,7 +2864,7 @@
 
 \begin{verbatim}
         def make_incrementor(n):
-                return lambda(x, incr=n): x+incr
+                return lambda x, incr=n: x+incr
 \end{verbatim}
 
 \subsection{Map, Reduce and Filter}
diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
index f20d77c..55ff36f 100644
--- a/Doc/tut/tut.tex
+++ b/Doc/tut/tut.tex
@@ -2864,7 +2864,7 @@
 
 \begin{verbatim}
         def make_incrementor(n):
-                return lambda(x, incr=n): x+incr
+                return lambda x, incr=n: x+incr
 \end{verbatim}
 
 \subsection{Map, Reduce and Filter}