diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index 51edb331e16..36582da0af6 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -606,7 +606,7 @@ For instance:
 
 \bcode\begin{verbatim}
 >>> import types
->>> if type(x) == types.StringType: print "It's a string"
+>>> if isinstance(x, types.StringType): print "It's a string"
 \end{verbatim}\ecode
 \end{funcdesc}
 
diff --git a/Doc/libfuncs.tex b/Doc/libfuncs.tex
index 51edb331e16..36582da0af6 100644
--- a/Doc/libfuncs.tex
+++ b/Doc/libfuncs.tex
@@ -606,7 +606,7 @@ For instance:
 
 \bcode\begin{verbatim}
 >>> import types
->>> if type(x) == types.StringType: print "It's a string"
+>>> if isinstance(x, types.StringType): print "It's a string"
 \end{verbatim}\ecode
 \end{funcdesc}