diff --git a/Doc/api/abstract.tex b/Doc/api/abstract.tex
index b38bc91..152f1a4 100644
--- a/Doc/api/abstract.tex
+++ b/Doc/api/abstract.tex
@@ -517,7 +517,7 @@
 
 
 \begin{cfuncdesc}{PyObject*}{PyNumber_And}{PyObject *o1, PyObject *o2}
-  Returns the ``bitwise and'' of \var{o2} and \var{o2} on success and
+  Returns the ``bitwise and'' of \var{o1} and \var{o2} on success and
   \NULL{} on failure. This is the equivalent of the Python expression
   \samp{\var{o1} \&\ \var{o2}}.
 \end{cfuncdesc}