diff --git a/types/webidl.d.ts b/types/webidl.d.ts
index 743749516b0..33b93439aae 100644
--- a/types/webidl.d.ts
+++ b/types/webidl.d.ts
@@ -83,12 +83,12 @@ interface WebidlUtil {
    * Stringifies {@param V}
    */
   Stringify (V: any): string
-  
+
   MakeTypeAssertion <I>(I: I): (arg: any) => arg is I
 
   /**
    * Mark a value as uncloneable for Node.js.
-   * This is only effective in some newer Node.js versions
+   * This is only effective in some newer Node.js versions.
    */
   markAsUncloneable (V: any): void
 }