diff -up cups-2.3.3op2/config-scripts/cups-defaults.m4.conf-timeoutstartsec cups-2.3.3op2/config-scripts/cups-defaults.m4
--- cups-2.3.3op2/config-scripts/cups-defaults.m4.conf-timeoutstartsec	2021-11-29 13:50:14.568976028 +0100
+++ cups-2.3.3op2/config-scripts/cups-defaults.m4	2021-11-29 13:51:02.785567762 +0100
@@ -482,3 +482,18 @@ AC_ARG_WITH([idle_exit_timeout], AS_HELP
 ])
 
 AC_SUBST([EXIT_TIMEOUT])
+
+dnl set TimeoutStartSec for cups.service
+dnl - if used as --without-*, it sets TimeoutStartSec to infinity
+AC_ARG_WITH([systemd-timeoutstartsec],
+    AS_HELP_STRING([--with-systemd-timeoutstartsec],
+	[set TimeoutStartSec value in cups.service, default=default value in systemd]), [
+    AS_IF([ test "x$withval" = "xno" ], [
+	TIMEOUTSTARTSEC="TimeoutStartSec=infinity"
+    ], [
+	TIMEOUTSTARTSEC="TimeoutStartSec=$withval"
+    ])
+], [
+    TIMEOUTSTARTSEC=""
+])
+AC_SUBST([TIMEOUTSTARTSEC])
diff -up cups-2.3.3op2/scheduler/org.cups.cupsd.service.in.conf-timeoutstartsec cups-2.3.3op2/scheduler/org.cups.cupsd.service.in
--- cups-2.3.3op2/scheduler/org.cups.cupsd.service.in.conf-timeoutstartsec	2021-11-29 13:50:14.551976172 +0100
+++ cups-2.3.3op2/scheduler/org.cups.cupsd.service.in	2021-11-29 13:50:14.568976028 +0100
@@ -8,6 +8,7 @@ Requires=cups.socket
 ExecStart=@sbindir@/cupsd -l
 Type=notify
 Restart=on-failure
+@TIMEOUTSTARTSEC@
 
 [Install]
 Also=cups.socket cups.path