diff --git a/joi/joi-tests.ts b/joi/joi-tests.ts
index 82d661db52..4eea606a6e 100644
--- a/joi/joi-tests.ts
+++ b/joi/joi-tests.ts
@@ -99,7 +99,7 @@ uriOpts = {scheme: expArr};
 
 var whenOpts: Joi.WhenOptions = null;
 
-whenOpts = {is: schema};
+whenOpts = {is: x};
 whenOpts = {is: schema, then: schema};
 whenOpts = {is: schema, otherwise: schema};
 
diff --git a/joi/joi.d.ts b/joi/joi.d.ts
index 0e88419f2d..c5d78dc88e 100644
--- a/joi/joi.d.ts
+++ b/joi/joi.d.ts
@@ -99,7 +99,7 @@ declare module 'joi' {
 		/**
 		 * the required condition joi type.
 		 */
-		is: Schema;
+		is: any;
 		/**
 		 * the alternative schema type if the condition is true. Required if otherwise is missing.
 		 */