diff --git a/autoconf/.md5sum b/autoconf/.md5sum
index 8ccc1e5e..f5c60628 100644
--- a/autoconf/.md5sum
+++ b/autoconf/.md5sum
@@ -1 +1 @@
-adbe7e7fde3c34a400d33a8ac631c877  autoconf-2.66.tar.xz
+dfb23a46ecb73a0abade39c053a6c5a1  autoconf-2.65.tar.xz
diff --git a/autoconf/Pkgfile b/autoconf/Pkgfile
index 862b5b39..61d2b436 100644
--- a/autoconf/Pkgfile
+++ b/autoconf/Pkgfile
@@ -3,7 +3,7 @@
 # Maintainer:  CRUX System Team, core-ports at crux dot nu
 
 name=autoconf
-version=2.66
+version=2.65
 release=1
 source=(ftp://ftp.gnu.org/gnu/$name/$name-$version.tar.xz)