diff --git a/code/controllers/subsystem/squeak.dm b/code/controllers/subsystem/squeak.dm
index 16b722c71b..964d970e2b 100644
--- a/code/controllers/subsystem/squeak.dm
+++ b/code/controllers/subsystem/squeak.dm
@@ -11,6 +11,7 @@ SUBSYSTEM_DEF(squeak)
 
 /datum/controller/subsystem/squeak/Initialize(timeofday)
 	trigger_migration(config.mice_roundstart)
+	return ..()
 
 /datum/controller/subsystem/squeak/proc/trigger_migration(num_mice=10)
 	if(!num_mice)