diff --git a/files/internals/functions b/files/internals/functions
index 5906bf4..461b35e 100644
--- a/files/internals/functions
+++ b/files/internals/functions
@@ -1646,9 +1646,12 @@ EOT
 gensigs() {
 	runtime_ndb="$tmpdir/.runtime.user.$$.ndb"
 	runtime_hdb="$tmpdir/.runtime.user.$$.hdb"
+	runtime_hexstrings="$tmpdir/.runtime.hexsigs.$$"
+	rm -f $runtime_ndb $runtime_hdb $runtime_hexstrings
+	touch $runtime_ndb $runtime_hdb $runtime_hexstrings
+	chmod 640 $runtime_ndb $runtime_hdb $runtime_hexstrings
 	ln -fs $runtime_ndb $sigdir/lmd.user.ndb
 	ln -fs $runtime_hdb $sigdir/lmd.user.hdb
-	runtime_hexstrings="$tmpdir/.runtime.hexsigs.$$"
 	if [ -s "$sig_cust_hex_file" ]; then
 		cat "$sig_hex_file" "$sig_cust_hex_file" > $runtime_hexstrings
 	else