https://bugs.gentoo.org/921125
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 # Autoconf for pngnq
 
 AC_INIT([pngnq],[1.1], [stuart.coyle@gmail.com])
-AM_INIT_AUTOMAKE[-Wall -Werror]
+AM_INIT_AUTOMAKE([-Wall -Werror])
 AC_COPYRIGHT([Copyright 2008-2011, Stuart Coyle])
 
 # check for progs