diff --git a/packages/form/src/widgets/select/select.widget.ts b/packages/form/src/widgets/select/select.widget.ts
index a344152ab..10a526763 100644
--- a/packages/form/src/widgets/select/select.widget.ts
+++ b/packages/form/src/widgets/select/select.widget.ts
@@ -120,7 +120,7 @@ export class SelectWidget extends ControlUIWidget<SFSelectWidgetSchema> implemen
       mode: mode || 'default',
       showSearch: toBool(showSearch, true),
       tokenSeparators: tokenSeparators || [],
-      maxTagCount: maxTagCount || undefined,
+      maxTagCount: maxTagCount || Infinity,
       optionHeightPx: optionHeightPx || 32,
       optionOverflowSize: optionOverflowSize || 8,
       showArrow: typeof showArrow !== 'boolean' ? undefined : showArrow,