--- a/cvmfs/authz/helper_log.cc	2022-07-04 12:15:08.000000000 +0200
+++ b/cvmfs/authz/helper_log.cc	2022-09-01 17:55:08.200175687 +0200
@@ -8,6 +8,7 @@
 #include <fcntl.h>
 #include <syslog.h>
 #include <unistd.h>
+#include <ctime>
 
 #include <cassert>
 #include <cstdarg>