diff --git a/xCAT-probe/debian/postinst b/xCAT-probe/debian/postinst
index 5ced18096..19af47964 100644
--- a/xCAT-probe/debian/postinst
+++ b/xCAT-probe/debian/postinst
@@ -20,6 +20,12 @@ set -e
 
 case "$1" in
     configure)
+        probe_lib=/opt/xcat/probe/lib/perl/xCAT
+        if [ -d "$probe_lib" ] && [ ! -L "$probe_lib" ] &&
+            [ "$(stat -c %a "$probe_lib")" = 644 ] &&
+            ! dpkg-statoverride --list "$probe_lib" >/dev/null; then
+            chmod 755 "$probe_lib"
+        fi
     ;;
 
     abort-upgrade|abort-remove|abort-deconfigure)
diff --git a/xCAT-probe/debian/rules b/xCAT-probe/debian/rules
index bb1842ebe..7f1a3c4ba 100755
--- a/xCAT-probe/debian/rules
+++ b/xCAT-probe/debian/rules
@@ -42,8 +42,8 @@ binary-arch:
 	dh_install -X".svn"
 	chmod 755 `pwd`/debian/xcat-probe/opt/xcat/bin/*
 	chmod 755 `pwd`/debian/xcat-probe/opt/xcat/probe/subcmds/*
-	chmod 644 `pwd`/debian/xcat-probe/opt/xcat/probe/lib/perl/*
-	chmod 644 `pwd`/debian/xcat-probe/opt/xcat/probe/lib/perl/xCAT/*
+	find `pwd`/debian/xcat-probe/opt/xcat/probe/lib -type d -exec chmod 755 {} +
+	find `pwd`/debian/xcat-probe/opt/xcat/probe/lib -type f -exec chmod 644 {} +
 #	dh_installmenu
 #	dh_installdebconf	
 #	dh_installlogrotate