diff --git a/mathomatic.spec b/mathomatic.spec
index a58676a..263be1f 100644
--- a/mathomatic.spec
+++ b/mathomatic.spec
@@ -1,23 +1,22 @@
 Summary:       Small, portable symbolic math program
 Name:          mathomatic
 Version:       16.0.5
-Release:       15%{?dist}
+Release:       16%{?dist}
 License:       LGPLv2
-Group:         Applications/Engineering
 URL:           http://www.mathomatic.org/math/
 #Source0:      http://mathomatic.org/mathomatic-%{version}.tar.bz2
 Source0:       http://mathomatic.orgserve.de/mathomatic-%{version}.tar.bz2
 Source1:       http://mathomatic.orgserve.de/math/png/mathomatic192x195.png
 Patch0:        mathomatic-16.0.5-libedit.patch
 BuildRequires: desktop-file-utils
-BuildRequires: libedit-devel
+BuildRequires: gcc
 BuildRequires: htmldoc
+BuildRequires: libedit-devel
 BuildRequires: ImageMagick
 # for make test
 BuildRequires: time
 Requires:      m4
 Requires:      rlwrap
-
 %description
 Mathomatic is a small, portable symbolic math program that can
 automatically solve, simplify, differentiate, combine, and compare
@@ -27,9 +26,7 @@ development since 1986.
 
 %package       tools
 Summary:       Various small math tools from mathomatic
-Group:         Applications/Engineering
 Requires:      %{name} = %{version}-%{release}
-
 %description tools
 This package contains small math tools from mathomatic to
  - calculate Pascal's triangle
@@ -66,7 +63,8 @@ pushd primes
 make test
 
 %files
-%doc AUTHORS COPYING README.txt changes.txt doc
+%license COPYING
+%doc AUTHORS README.txt changes.txt doc
 %{_bindir}/%{name}
 %{_bindir}/rmath
 %{_bindir}/matho
@@ -78,7 +76,8 @@ make test
 %{_datadir}/%{name}
 
 %files tools
-%doc AUTHORS COPYING README.txt changes.txt doc
+%license COPYING
+%doc AUTHORS README.txt changes.txt doc
 %{_bindir}/matho-sum
 %{_bindir}/matho-mult
 %{_bindir}/matho-pascal
@@ -93,6 +92,9 @@ make test
 %{_mandir}/man1/primorial.1*
 
 %changelog
+* Sun Jul 15 2018 Terje Rosten <terje.rosten@ntnu.no> - 16.0.5-16
+- Add C compiler
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 16.0.5-15
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild
 
@@ -123,7 +125,7 @@ make test
 * Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 16.0.5-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
 
-* Mon Nov 19 2013 Terje Rosten <terje.rosten@ntnu.no> - 16.0.5-5
+* Tue Nov 19 2013 Terje Rosten <terje.rosten@ntnu.no> - 16.0.5-5
 - Use mirror for source tarball
 - Cleanup
 
@@ -190,7 +192,7 @@ make test
 * Wed Feb 25 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 14.3.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild
 
-* Mon Feb  8 2009 Terje Rosten <terje.rosten@ntnu.no> - 14.3.1-1
+* Sun Feb  8 2009 Terje Rosten <terje.rosten@ntnu.no> - 14.3.1-1
 - 14.3.1
 
 * Mon Jan  5 2009 Terje Rosten <terje.rosten@ntnu.no> - 14.2.8-1