diff --git a/glibmm2_4.changes b/glibmm2_4.changes
index 72a2b95..a3d28a7 100644
--- a/glibmm2_4.changes
+++ b/glibmm2_4.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sat Dec  3 19:04:51 UTC 2016 - jengelh@inai.de
+
+- Rectify RPM groups, replace old macros.
+
 -------------------------------------------------------------------
 Fri Dec  2 12:57:56 UTC 2016 - dimstar@opensuse.org
 
diff --git a/glibmm2_4.spec b/glibmm2_4.spec
index f2c5264..362daf4 100644
--- a/glibmm2_4.spec
+++ b/glibmm2_4.spec
@@ -25,7 +25,7 @@ Version:        2.50.0
 Release:        0
 Summary:        C++ Interface for Glib
 License:        LGPL-2.1+
-Group:          System/Libraries
+Group:          Development/Libraries/C and C++
 Url:            http://www.gtkmm.org/
 Source0:        http://download.gnome.org/sources/glibmm/2.50/%{_name}-%{version}.tar.xz
 Source99:       baselibs.conf
@@ -90,16 +90,13 @@ C++ and makes it possible for gtkmm to wrap GObject-based APIs.
 
 %build
 %configure --disable-static
-make %{?jobs:-j%jobs}
+make %{?_smp_mflags}
 
 %install
-%makeinstall
+%make_install
 rm %{buildroot}%{_libdir}/*.la
 %fdupes %{buildroot}
 
-%clean
-rm -rf %{buildroot}
-
 %post -n libglibmm%{so_ver} -p /sbin/ldconfig
 
 %postun -n libglibmm%{so_ver} -p /sbin/ldconfig