diff --git a/kscreenlocker.spec b/kscreenlocker.spec
index c7248a9..42d01f0 100644
--- a/kscreenlocker.spec
+++ b/kscreenlocker.spec
@@ -2,7 +2,7 @@
 
 Name:          kscreenlocker
 Version:       5.13.4
-Release:       2mamba
+Release:       3mamba
 Summary:       KDE Frameworks 5 screen locker
 Group:         System/Libraries
 Vendor:        openmamba
@@ -128,7 +128,7 @@ exit 0
 %defattr(-,root,root)
 %{_libdir}/libKScreenLocker.so.*
 %{_libdir}/qt5/plugins/screenlocker_kcm.so
-%attr(0755,root,root) %{_libexecdir}/kcheckpass
+%attr(4755,root,root) %{_libexecdir}/kcheckpass
 %{_libexecdir}/kscreenlocker_greet
 
 %files -n lib%{name}-devel
@@ -142,6 +142,9 @@ exit 0
 %{_libdir}/libKScreenLocker.so
 
 %changelog
+* Mon Aug 20 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 5.13.4-3mamba
+- fix giving suid permissions to kcheckpass
+
 * Tue Aug 14 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 5.13.4-2mamba
 - give suuid permissions to kcheckpass to fix (again) screen unlocking