diff --git a/configure.ac b/configure.ac
index f2e1ed7..364ae5b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 
 AC_INIT(mail, 0.0.3, devilhorns@comcast.net)
 AC_PREREQ(2.52)
-AC_CONFIG_SRCDIR(configure.in)
+AC_CONFIG_SRCDIR(configure.ac)
 AC_CANONICAL_BUILD
 AC_CANONICAL_HOST
 AC_ISC_POSIX