diff --git a/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts b/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts
index 297f849b59dcd3fa925a1be30d1cb120c78650ae..9c9aa3e7b3f720d50394d4e3b59567c2943098db 100644
--- a/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts
+++ b/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts
@@ -278,8 +278,8 @@ class SharedProcessMain extends Disposable {
 				new PtyHostService({
 					graceTime: LocalReconnectConstants.GraceTime,
 					shortGraceTime: LocalReconnectConstants.ShortGraceTime,
-					scrollback: configurationService.getValue<number>(TerminalSettingId.PersistentSessionScrollback) || 1,
-					useExperimentalSerialization: !!configurationService.getValue<boolean>(TerminalSettingId.PersistentSessionExperimentalSerializer),
+					scrollback: configurationService.getValue<number>(TerminalSettingId.PersistentSessionScrollback) ?? 100,
+					useExperimentalSerialization: configurationService.getValue<boolean>(TerminalSettingId.PersistentSessionExperimentalSerializer) ?? true,
 				},
 					configurationService,
 					logService,