diff --git a/dc3dd.spec b/dc3dd.spec
index 6a9ae49..f2d9fdf 100644
--- a/dc3dd.spec
+++ b/dc3dd.spec
@@ -1,6 +1,6 @@
 Name:           dc3dd
 Version:        7.2.646
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Patched version of GNU dd for use in computer forensics
 
 Group:          Applications/Editors
@@ -15,6 +15,7 @@ Patch0:         dc3dd-automake.patch
 BuildRequires:  gcc
 BuildRequires:  gettext
 BuildRequires:  gettext-devel
+BuildRequires:  gnulib-devel
 BuildRequires:  perl(Locale::gettext)
 BuildRequires:  p7zip
 BuildRequires:  m4, readline-devel, autoconf, automake
@@ -40,8 +41,10 @@ were rewritten for dc3dd.
 
 
 %prep
-%setup -q
-%patch0 -p 1 -b .automake
+%autosetup -S git
+
+# Update the embedded gnulib library files
+gnulib-tool --update
 
 #Missing x flag in version 7.2.646 makes the build fail
 chmod +x build-aux/git-version-gen configure
@@ -65,6 +68,9 @@ make install DESTDIR=$RPM_BUILD_ROOT
 %{_mandir}/man1/%{name}.*
 
 %changelog
+* Tue Aug 28 2018 Michal Ambroz <rebus [AT] seznam.cz> - 7.2.646-6
+- fix FTBS, update gnulib embedded library files
+
 * Thu Jul 12 2018 Fedora Release Engineering <releng@fedoraproject.org> - 7.2.646-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild