diff --git a/bluebird/bluebird-tests.ts b/bluebird/bluebird-tests.ts
index d7995438c1..7970ee0fe5 100644
--- a/bluebird/bluebird-tests.ts
+++ b/bluebird/bluebird-tests.ts
@@ -338,6 +338,17 @@ fooOrBarProm = fooProm.caught(Promise.CancellationError, (reason: any) => {
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
+{
+	class CustomError extends Error {
+		public customField: number;
+	}
+	fooProm = fooProm.catch(CustomError, reason => {
+		let a: number = reason.customField
+	})
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
 barProm = fooProm.error((reason: any) => {
 	return bar;
 });
diff --git a/bluebird/bluebird.d.ts b/bluebird/bluebird.d.ts
index 3dc66b78f0..6562046138 100644
--- a/bluebird/bluebird.d.ts
+++ b/bluebird/bluebird.d.ts
@@ -71,14 +71,19 @@ class Bluebird<R> implements Bluebird.Thenable<R>, Bluebird.Inspection<R> {
    */
   catch(predicate: (error: any) => boolean, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
   caught(predicate: (error: any) => boolean, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
+  
   catch<U>(predicate: (error: any) => boolean, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
   caught<U>(predicate: (error: any) => boolean, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
-  catch(ErrorClass: Function, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
-  caught(ErrorClass: Function, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
-  catch<U>(ErrorClass: Function, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
-  caught<U>(ErrorClass: Function, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
+  
+  catch<E>(ErrorClass: new () => E, onReject: (error: E) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
+  caught<E>(ErrorClass: new () => E, onReject: (error: E) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
+
+  catch<E, U>(ErrorClass: new () => E, onReject: (error: E) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
+  caught<E, U>(ErrorClass: new () => E, onReject: (error: E) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
+  
   catch(predicate: Object, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
   caught(predicate: Object, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
+  
   catch<U>(predicate: Object, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
   caught<U>(predicate: Object, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;