diff --git a/types/chai/index.d.ts b/types/chai/index.d.ts
index 8a9d45d331..984e4103d1 100644
--- a/types/chai/index.d.ts
+++ b/types/chai/index.d.ts
@@ -988,7 +988,7 @@ declare namespace Chai {
          * @param errType  Potential expected message match or error constructor.
          * @param message   Message to display on error.
          */
-        throws(fn: Function, regExp: RegExp|Function, message?: string): void;
+        throws(fn: Function, errType: RegExp|Function, message?: string): void;
 
         /**
          * Asserts that function will throw an error that is an instance of constructor