diff --git a/src/common/util/debounce.ts b/src/common/util/debounce.ts
index dd2eac8968..4164edb75a 100644
--- a/src/common/util/debounce.ts
+++ b/src/common/util/debounce.ts
@@ -4,8 +4,14 @@
 // be triggered. The function will be called after it stops being called for
 // N milliseconds. If `immediate` is passed, trigger the function on the
 // leading edge, instead of the trailing.
-export default function debounce(func, wait, immediate) {
+// tslint:disable-next-line: ban-types
+export const debounce = <T extends Function>(
+  func: T,
+  wait,
+  immediate = false
+): T => {
   let timeout;
+  // @ts-ignore
   return function(...args) {
     // tslint:disable:no-this-assignment
     // @ts-ignore
@@ -23,4 +29,4 @@ export default function debounce(func, wait, immediate) {
       func.apply(context, args);
     }
   };
-}
+};
diff --git a/src/panels/lovelace/cards/hui-map-card.ts b/src/panels/lovelace/cards/hui-map-card.ts
index 227304da45..cc6db16db0 100644
--- a/src/panels/lovelace/cards/hui-map-card.ts
+++ b/src/panels/lovelace/cards/hui-map-card.ts
@@ -19,7 +19,7 @@ import {
 } from "../../../common/dom/setup-leaflet-map";
 import computeStateDomain from "../../../common/entity/compute_state_domain";
 import computeStateName from "../../../common/entity/compute_state_name";
-import debounce from "../../../common/util/debounce";
+import { debounce } from "../../../common/util/debounce";
 import parseAspectRatio from "../../../common/util/parse-aspect-ratio";
 import computeDomain from "../../../common/entity/compute_domain";
 
diff --git a/src/panels/lovelace/hui-root.ts b/src/panels/lovelace/hui-root.ts
index 60a32a1297..4dfbad5940 100644
--- a/src/panels/lovelace/hui-root.ts
+++ b/src/panels/lovelace/hui-root.ts
@@ -31,7 +31,7 @@ import "../../components/ha-paper-icon-button-arrow-prev";
 import "../../components/ha-icon";
 import { loadModule, loadCSS, loadJS } from "../../common/dom/load_resource";
 import { subscribeNotifications } from "../../data/ws-notifications";
-import debounce from "../../common/util/debounce";
+import { debounce } from "../../common/util/debounce";
 import { HomeAssistant } from "../../types";
 import { LovelaceConfig } from "../../data/lovelace";
 import { navigate } from "../../common/navigate";