diff --git a/gnu-cobol.spec b/gnu-cobol.spec
index 44066ec..c070a0a 100644
--- a/gnu-cobol.spec
+++ b/gnu-cobol.spec
@@ -22,7 +22,7 @@ Release: 0
 Source: gnu-cobol-1.1.tar.gz
 License: GPL-2.0+
 Group: Development/Languages/Other
-URL: http://www.opencobol.org/
+Url: http://www.opencobol.org/
 Provides: opencobol = %version
 Requires: libcob1 = %version
 BuildRequires: db-devel gmp-devel ncurses-devel
@@ -57,11 +57,11 @@ providing full access to nearly all C libraries.
 %patch1 -p1
 
 %build
-./configure --prefix=/usr --libdir='%{_libdir}' --infodir='%{_infodir}'
+%configure
 make
 
 %install
-make DESTDIR=${RPM_BUILD_ROOT}/ install
+make DESTDIR=%{buildroot} install
 
 %post
 /sbin/install-info %{_infodir}/gnu-cobol.info.gz %{_infodir}/dir
@@ -73,29 +73,29 @@ make DESTDIR=${RPM_BUILD_ROOT}/ install
 
 %postun -n libcob1 -p /sbin/ldconfig
 
-%clean
-
 %files
 %defattr(-,root,root)
 %doc ABOUT-NLS AUTHORS COPYING COPYING.DOC ChangeLog NEWS README THANKS TODO
 %lang(ja) /usr/share/locale/ja/LC_MESSAGES/gnu-cobol.mo
-/usr/bin/cob-config
-/usr/bin/cobc
-/usr/bin/cobcrun
+%{_bindir}/cob-config
+%{_bindir}/cobc
+%{_bindir}/cobcrun
 %{_infodir}/gnu-cobol.info.gz
 %{_libdir}/gnu-cobol
-/usr/share/gnu-cobol
+%{_datadir}/gnu-cobol
 
 %files -n libcob1
 %defattr(-,root,root)
 %doc COPYING.LIB
-%{_libdir}/libcob.so
 %{_libdir}/libcob.so.1
 %{_libdir}/libcob.so.1.0.0
 
 %files -n libcob-devel
 %defattr(-,root,root)
-/usr/include/libcob.h
-/usr/include/libcob
+%{_includedir}/libcob.h
+%{_includedir}/libcob
+%{_libdir}/libcob.so
 %{_libdir}/libcob.a
 %{_libdir}/libcob.la
+
+%changelog
\ No newline at end of file