diff -up cups-2.2.5/scheduler/main.c.systemd-socket cups-2.2.5/scheduler/main.c
--- cups-2.2.5/scheduler/main.c.systemd-socket	2017-10-17 18:59:53.732431498 +0200
+++ cups-2.2.5/scheduler/main.c	2017-10-17 19:02:13.132275861 +0200
@@ -691,8 +691,16 @@ main(int  argc,				/* I - Number of comm
 
 #ifdef HAVE_ONDEMAND
   if (OnDemand)
+  {
     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started on demand.");
-  else
+# ifdef HAVE_SYSTEMD
+    sd_notifyf(0, "READY=1\n"
+               "STATUS=Scheduler is running...\n"
+               "MAINPID=%lu",
+               (unsigned long) getpid());
+# endif /* HAVE_SYSTEMD */
+  } else
+
 #endif /* HAVE_ONDEMAND */
   if (fg)
     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started in foreground.");
diff -up cups-2.2.5/scheduler/org.cups.cupsd.path.in.systemd-socket cups-2.2.5/scheduler/org.cups.cupsd.path.in
--- cups-2.2.5/scheduler/org.cups.cupsd.path.in.systemd-socket	2017-10-13 20:22:26.000000000 +0200
+++ cups-2.2.5/scheduler/org.cups.cupsd.path.in	2017-10-17 18:59:53.732431498 +0200
@@ -3,7 +3,7 @@ Description=CUPS Scheduler
 PartOf=org.cups.cupsd.service
 
 [Path]
-PathExists=@CUPS_CACHEDIR@/org.cups.cupsd
+PathExistsGlob=@CUPS_REQUESTS@/d*
 
 [Install]
 WantedBy=multi-user.target
diff -up cups-2.2.5/scheduler/org.cups.cupsd.service.in.systemd-socket cups-2.2.5/scheduler/org.cups.cupsd.service.in
--- cups-2.2.5/scheduler/org.cups.cupsd.service.in.systemd-socket	2017-10-13 20:22:26.000000000 +0200
+++ cups-2.2.5/scheduler/org.cups.cupsd.service.in	2017-10-17 18:59:53.732431498 +0200
@@ -1,10 +1,11 @@
 [Unit]
 Description=CUPS Scheduler
 Documentation=man:cupsd(8)
+After=network.target
 
 [Service]
 ExecStart=@sbindir@/cupsd -l
-Type=simple
+Type=notify
 
 [Install]
 Also=org.cups.cupsd.socket org.cups.cupsd.path