diff --git a/nc6-1.0-dnl.patch b/nc6-1.0-dnl.patch
new file mode 100644
index 0000000..74bd082
--- /dev/null
+++ b/nc6-1.0-dnl.patch
@@ -0,0 +1,18 @@
+diff --git a/configure.ac b/configure.ac
+index cd5dc28..cf3ef43 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -3,9 +3,11 @@ AC_INIT(nc6, 1.0, [ds6-devel@deepspace6.net])
+ AC_CONFIG_AUX_DIR(config)
+ AC_CONFIG_SRCDIR(src/main.c)
+ AM_GNU_GETTEXT_VERSION(0.14.1)
+-AM_INIT_AUTOMAKE(1.6)           dnl Automake 1.6 or better is required
++dnl Automake 1.6 or better is required
++AM_INIT_AUTOMAKE(1.6)
+ AM_CONFIG_HEADER(config.h)
+-AC_PREREQ(2.52)                 dnl Autoconf 2.52 or better is required
++AC_PREREQ(2.52)
++dnl Autoconf 2.52 or better is required
+ 
+ 
+ dnl Checks for programs.
diff --git a/nc6.spec b/nc6.spec
index 0677858..83b54b5 100644
--- a/nc6.spec
+++ b/nc6.spec
@@ -1,11 +1,14 @@
 Summary:        Netcat with IPv6 Support
 Name:           nc6
 Version:        1.0
-Release:        18%{?dist}
+Release:        19%{?dist}
 Group:          Applications/Internet
 URL:            http://www.deepspace6.net/projects/netcat6.html
 License:        GPLv2+
 Source:         ftp://ftp.deepspace6.net/pub/ds6/sources/nc6/%{name}-%{version}.tar.bz2
+# Given that the trailing newlines are now a part of the comments,
+# some macros with comments on the same line break.
+Patch0:         nc6-1.0-dnl.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  gettext-devel
@@ -24,6 +27,7 @@ ago as another one of those cryptic but standard Unix tools."
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 autoreconf -fiv
@@ -39,6 +43,9 @@ make DESTDIR="%{buildroot}" install
 %doc README AUTHORS COPYING NEWS TODO
 
 %changelog
+* Tue Jun 10 2014 Petr Šabata <contyk@redhat.com> - 1.0-19
+- Fix FTBFS with the current autoconf
+
 * Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.0-18
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild