diff --git a/picocolors.d.ts b/picocolors.d.ts
index 0ae2855..94e146a 100644
--- a/picocolors.d.ts
+++ b/picocolors.d.ts
@@ -1,5 +1,5 @@
 import { Colors } from "./types"
 
-declare const picocolors: Colors & { createColors: (enabled: boolean) => Colors }
+declare const picocolors: Colors & { createColors: (enabled?: boolean) => Colors }
 
 export = picocolors