diff --git a/collector/systemd_linux.go b/collector/systemd_linux.go
index 0d64397f..76090fc5 100644
--- a/collector/systemd_linux.go
+++ b/collector/systemd_linux.go
@@ -27,7 +27,7 @@ import (
 
 var (
 	unitWhitelist = flag.String("collector.systemd.unit-whitelist", ".+", "Regexp of systemd units to whitelist. Units must both match whitelist and not match blacklist to be included.")
-	unitBlacklist = flag.String("collector.systemd.unit-blacklist", "", "Regexp of systemd units to blacklist. Units must both match whitelist and not match blacklist to be included.")
+	unitBlacklist = flag.String("collector.systemd.unit-blacklist", ".+\\.scope", "Regexp of systemd units to blacklist. Units must both match whitelist and not match blacklist to be included.")
 )
 
 type systemdCollector struct {