diff --git a/hplip.spec b/hplip.spec
index ac166d5..d995263 100644
--- a/hplip.spec
+++ b/hplip.spec
@@ -3,7 +3,7 @@
 %define cups_ver %(cups-config --api-version)
 Name:          hplip
 Version:       3.16.5
-Release:       2mamba
+Release:       3mamba
 Summary:       A printer driver for HP inkjet devices
 Group:         System/Spooling
 Vendor:        openmamba
@@ -131,9 +131,10 @@ fi
 #   service hplip restart
 #   service cups restart
 #fi
-[ -e %{_sysconfdir}/sane.d/dll.conf ] || exit 1
-grep hpaio %{_sysconfdir}/sane.d/dll.conf >/dev/null ||
-   echo "hpaio" >> %{_sysconfdir}/sane.d/dll.conf
+if [ -e %{_sysconfdir}/sane.d/dll.conf ]; then
+  grep hpaio %{_sysconfdir}/sane.d/dll.conf >/dev/null ||
+     echo "hpaio" >> %{_sysconfdir}/sane.d/dll.conf
+fi
 /sbin/ldconfig
 :
 
@@ -197,6 +198,9 @@ grep hpaio %{_sysconfdir}/sane.d/dll.conf >/dev/null ||
 %{_datadir}/doc/*
 
 %changelog
+* Fri Jul 08 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 3.16.5-3mamba
+- fix exiting with error in postun script
+
 * Mon Jul 04 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 3.16.5-2mamba
 - fix patch systray-hide-when-inactive