diff --git a/data/ModemManager.service.in b/data/ModemManager.service.in
index 4e4472d9..0bd23053 100644
--- a/data/ModemManager.service.in
+++ b/data/ModemManager.service.in
@@ -10,6 +10,7 @@ BusName=org.freedesktop.ModemManager1
 ExecStart=@sbindir@/ModemManager
 StandardError=null
 Restart=on-abort
+KillMode=mixed
 CapabilityBoundingSet=CAP_SYS_ADMIN CAP_NET_ADMIN
 ProtectSystem=true
 ProtectHome=true