diff --git a/chai/chai.d.ts b/chai/chai.d.ts
index fc767c639..a2ef1379b 100644
--- a/chai/chai.d.ts
+++ b/chai/chai.d.ts
@@ -94,6 +94,7 @@ declare module chai {
         that: Expect;
         and: Expect;
         have: Expect;
+        has: Expect;
         with: Expect;
         at: Expect;
         of: Expect;