diff --git a/angular-ui-bootstrap/angular-ui-bootstrap-tests.ts b/angular-ui-bootstrap/angular-ui-bootstrap-tests.ts
index b14af506b6..15f0f2b661 100644
--- a/angular-ui-bootstrap/angular-ui-bootstrap-tests.ts
+++ b/angular-ui-bootstrap/angular-ui-bootstrap-tests.ts
@@ -155,6 +155,7 @@ testApp.config((
         placement: 'bottom',
         animation: false,
         popupDelay: 1000,
+        popupCloseDelay: 1000,
         appendToBody: true,
         trigger: 'mouseenter hover',
         useContentExp: true,
diff --git a/angular-ui-bootstrap/index.d.ts b/angular-ui-bootstrap/index.d.ts
index b5b4e1a5e6..bc80d96b5a 100644
--- a/angular-ui-bootstrap/index.d.ts
+++ b/angular-ui-bootstrap/index.d.ts
@@ -161,7 +161,7 @@ declare module 'angular' {
 
             /**
              * Defines the initial date, when no model value is specified.
-             * 
+             *
              * @default null
              */
             initDate?: any;
@@ -834,12 +834,19 @@ declare module 'angular' {
             animation?: boolean;
 
             /**
-             * For how long should the user have to have the mouse over the element before the tooltip shows (in milliseconds)?
+             * Popup delay in milliseconds until it opens.
              *
              * @default 0
              */
             popupDelay?: number;
 
+            /**
+             * For how long should the tooltip remain open after the close trigger event?
+             *
+             * @default 0
+             */
+            popupCloseDelay?: number;
+
             /**
              * Should the tooltip be appended to `$body` instead of the parent element?
              *