diff --git a/qsynth.spec b/qsynth.spec
index 39bad35..200e173 100644
--- a/qsynth.spec
+++ b/qsynth.spec
@@ -27,23 +27,29 @@ synthesiser based on the Soundfont specification.
 %prep
 %setup -q
 %patch0 -p1 -b .qt4
+iconv --from=ISO88591 --to=UTF8 AUTHORS -o AUTHORS
+
 
 %build
 %configure
 %{__make} %{?_smp_mflags}
 
+
 %install
 %{__rm} -rf %{buildroot}
 %{__make} DESTDIR=%{buildroot} install
 
 # desktop file categories
-#BASE="X-Fedora Application AudioVideo"
-#XTRA="X-Jack X-Synthesis"
+INCORRECT="Applications Multimedia MIDI JACK ALSA"
+BASE="Audio"
+XTRA="X-MIDI X-Jack X-Alsa X-Synthesis"
 
 %{__mkdir} -p %{buildroot}%{_datadir}/applications
 desktop-file-install --vendor %{desktop_vendor} \
-  --delete-original		     
+  --delete-original \
   --dir %{buildroot}%{_datadir}/applications    \
+  `for c in ${INCORRECT} ; do echo "--remove-category $c " ; done` \
+  `for c in ${BASE} ${XTRA} ; do echo "--add-category $c " ; done` \
   %{buildroot}%{_datadir}/applications/qsynth.desktop