diff --git a/types/hapi__joi/index.d.ts b/types/hapi__joi/index.d.ts
index 2ccd02c3c6..9c65e8e9b6 100644
--- a/types/hapi__joi/index.d.ts
+++ b/types/hapi__joi/index.d.ts
@@ -1129,7 +1129,7 @@ declare namespace Joi {
         tailor(targets: string | string[]): Schema;
 
         /**
-         * Annotates the key with an unit name.
+         * Annotates the key with a unit name.
          */
         unit(name: string): this;