diff --git a/nas.spec b/nas.spec
index 2c5dab8..e732fe4 100644
--- a/nas.spec
+++ b/nas.spec
@@ -1,7 +1,7 @@
 Name:       nas 
 Summary:    The Network Audio System (NAS)
 Version:    1.9.3
-Release:    5%{?dist}
+Release:    6%{?dist}
 URL:        http://radscan.com/nas.html
 License:    Public Domain
 Group:      Development/Libraries
@@ -17,6 +17,8 @@ BuildRequires:  imake
 BuildRequires:  libX11-devel libXau-devel libXaw-devel libXext-devel
 BuildRequires:  libXp-devel libXt-devel
 BuildRequires:  systemd-units
+# Update config.sub to support aarch64, bug #926196
+BuildRequires: autoconf libtool automake
 
 Requires:           %{name}-libs = %{version}-%{release}
 Requires(post):     systemd-sysv systemd-units
@@ -61,6 +63,10 @@ Development files and the documentation for Network Audio System.
 %prep
 %setup -q
 %patch0 -p1 -b .move_AuErrorDB
+# Update config.sub to support aarch64, bug #926196
+cp -p %{_datadir}/automake-*/config.{sub,guess} config
+sed -i -e '/AC_FUNC_SNPRINTF/d' config/configure.ac
+autoreconf -i -f config
 for F in HISTORY; do
     iconv --from-code=ISO_8859-15 --to-code=UTF-8 "$F" > "${F}.tmp"
     touch -r "$F" "${F}.tmp"
@@ -138,6 +144,9 @@ echo '  systemd-sysv-convert --apply %{daemon}'
 
 
 %changelog
+* Wed Mar 27 2013 Petr Pisar <ppisar@redhat.com> - 1.9.3-6
+- Update config.sub to support aarch64 (bug #926196)
+
 * Thu Feb 14 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.3-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild