diff --git a/src/main/game/springsettings.ts b/src/main/game/springsettings.ts
index 62255e5c8..9ac0efb4f 100644
--- a/src/main/game/springsettings.ts
+++ b/src/main/game/springsettings.ts
@@ -101,6 +101,7 @@ const BAR_SPRINGSETTINGS_DEFAULTS: Record<string, string | number> = {
     LinkIncomingSustainedBandwidth: 1048576,
     LinkIncomingPeakBandwidth: 1048576,
     LinkIncomingMaxPacketRate: 2048,
+    DemoFileExtension: "barreplay",
 };
 
 function readSettings(filePath: string): Map<string, string> {