diff --git a/extra/firefox/PKGBUILD b/extra/firefox/PKGBUILD
index e056386db..623f5f35f 100644
--- a/extra/firefox/PKGBUILD
+++ b/extra/firefox/PKGBUILD
@@ -19,7 +19,7 @@ depends=('gtk3' 'gtk2' 'mozilla-common' 'libxt' 'startup-notification' 'mime-typ
          'dbus-glib' 'alsa-lib' 'ffmpeg' 'libvpx' 'libevent' 'nss' 'hunspell'
          'sqlite' 'ttf-font' 'icu')
 makedepends=('unzip' 'zip' 'diffutils' 'python2' 'yasm' 'mesa' 'imake' 'gconf'
-             'xorg-server-xvfb' 'libpulse' 'inetutils')
+             'xorg-server-xvfb' 'libpulse' 'inetutils' 'autoconf2.13')
 optdepends=('networkmanager: Location detection via available WiFi networks'
             'upower: Battery API')
 options=('!emptydirs' '!makeflags')