diff --git a/plugins/player_sync/module/player_sync.lua b/plugins/player_sync/module/player_sync.lua
index 28346ffe..473b6e5e 100644
--- a/plugins/player_sync/module/player_sync.lua
+++ b/plugins/player_sync/module/player_sync.lua
@@ -379,7 +379,8 @@ end
 -- Upload inventory when a player leaves the game. Triggers on restart after crash if player was online during crash.
 player_sync.events[defines.events.on_pre_player_left_game] = function(event)
 	-- for some reason, on_pre_player_left_game gets called before on_server_startup so script_data isn't ready yet
-	if not compat.script_data.player_sync then
+	-- migrate: saves from before the rename still have their data under inventory_sync
+	if not compat.script_data.player_sync and not compat.script_data.inventory_sync then
 		log("ERROR: script data for player sync is not defined")
 		return
 	end