Fix typo.
diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index dcfc36c..33777dc 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -29,7 +29,7 @@
/* Visual Studio 2005 introduces deprecation warnings for
"insecure" and POSIX functions. The insecure functions should
- be replaces by *_s versions (according to Microsoft); the
+ be replaced by *_s versions (according to Microsoft); the
POSIX functions by _* versions (which, according to Microsoft,
would be ISO C conforming). Neither renaming is feasible, so
we just silence the warnings. */