diff --git a/vcftools.spec b/vcftools.spec
index e2131c8..80be6cc 100644
--- a/vcftools.spec
+++ b/vcftools.spec
@@ -1,12 +1,13 @@
 Name:		vcftools
 Version:	0.1.15
-Release:	5%{?dist}
+Release:	6%{?dist}
 Summary:	VCF file manipulation tools
 
 Group:		Applications/Engineering
 License:	GPLv3 
 URL:		https://vcftools.github.io/
 Source0:	https://github.com/%{name}/%{name}/releases/download/v%{version}/%{name}-%{version}.tar.gz
+BuildRequires:	gcc-c++
 BuildRequires:	perl-generators
 BuildRequires:	zlib-devel
 
@@ -22,7 +23,7 @@ comparing and calculate some basic population genetic statistics.
 
 %build
 %configure
-make %{?_smp_mflags} CPPFLAGS="%{optflags}" CFLAGS="%{optflags}"
+%make_build
 
 %check
 make check
@@ -32,7 +33,8 @@ make install DESTDIR=$RPM_BUILD_ROOT INSTALL='install -p'
 
 
 %files
-%doc LICENSE README.md
+%doc README.md
+%license LICENSE
 %{_bindir}/vcf-compare
 %{_bindir}/fill-aa
 %{_bindir}/fill-an-ac
@@ -65,6 +67,9 @@ make install DESTDIR=$RPM_BUILD_ROOT INSTALL='install -p'
 %{_mandir}/man1/vcftools.1.gz
 
 %changelog
+* Mon Apr 09 2018 Filipe Rosset <rosset.filipe@gmail.com> - 0.1.15-6
+- added gcc-c++ as BR
+
 * Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.15-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild