diff --git a/mcomix.spec b/mcomix.spec
index 96f3624..75f63e1 100644
--- a/mcomix.spec
+++ b/mcomix.spec
@@ -1,6 +1,6 @@
 Name:		mcomix
 Version:	1.01
-Release:	4%{?dist}
+Release:	5%{?dist}
 Summary:	User-friendly, customizable image viewer for comic books
 
 Group:		Amusements/Graphics
@@ -42,6 +42,10 @@ is written in Python and uses GTK+ through the PyGTK bindings.
 %patch0 -p1 -b .rpmbuild
 %patch1 -p1 -b .gettext
 
+# Remove unuseful and invalid entry
+sed -i mime/mcomix.appdata.xml \
+	-e '\@project_group@d'
+
 %build
 # save timestamps
 sed -i -e 's|shutil.copy|shutil.copy2|' mcomix/main.py
@@ -97,7 +101,7 @@ desktop-file-install \
 	$RPM_BUILD_ROOT%{_datadir}/applications/%{name}.desktop
 
 appstream-util validate-relax --nonet \
-	$RPM_BUILD_ROOT%{_datadir}/appdata/%{name}.appdata.xml >/dev/null
+	$RPM_BUILD_ROOT%{_datadir}/appdata/%{name}.appdata.xml
 
 mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/gconf/schemas
 install -cpm 644 ./mime/comicbook.schemas \
@@ -161,6 +165,9 @@ fi
 
 
 %changelog
+* Thu Feb  4 2016 Mamoru TASAKA <mtasaka@fedoraproject.org> - 1.01-5
+- Fix appdata file (remove invalid entry)
+
 * Thu Feb 04 2016 Fedora Release Engineering <releng@fedoraproject.org> - 1.01-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild