diff --git a/kdesu.spec b/kdesu.spec
index f870f95..80cf904 100644
--- a/kdesu.spec
+++ b/kdesu.spec
@@ -29,6 +29,7 @@ BuildRequires:  kpty-devel >= %{_kf5_version}
 BuildRequires:  kservice-devel >= %{_kf5_version}
 BuildRequires:  pkgconfig(Qt5Core) >= 5.2.0
 BuildRequires:  pkgconfig(x11)
+PreReq:         permissions
 Summary:        User interface for running shell commands with root privileges
 License:        LGPL-2.1+
 Group:          System/GUI/KDE
@@ -76,16 +77,21 @@ Development files.
   %kf5_makeinstall -C build
   %fdupes -s %{buildroot}
 
-%post -n %lname -p /sbin/ldconfig
+%post -n %lname 
+/sbin/ldconfig
+%set_permissions %{_kf5_libexecdir}/kdesud
 
 %postun -n %lname -p /sbin/ldconfig
 
+%verifyscript
+%verify_permissions -e %{_kf5_libexecdir}/kdesud
+
 %files -n %lname
 %defattr(-,root,root)
 %doc COPYING* README*
 %{_kf5_libdir}/libKF5Su.so.*
 %{_kf5_libexecdir}/kdesu_stub
-%{_kf5_libexecdir}/kdesud
+%verify(not mode) %attr(2755,root,nogroup) %{_kf5_libexecdir}/kdesud
 
 %files devel
 %defattr(-,root,root)