diff --git a/tslib.es6.js b/tslib.es6.js
index 801630c..270cc22 100644
--- a/tslib.es6.js
+++ b/tslib.es6.js
@@ -294,7 +294,7 @@ export function __classPrivateFieldIn(state, receiver) {
 
 export function __addDisposableResource(env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tslib.es6.mjs b/tslib.es6.mjs
index 3f941d2..c8e2999 100644
--- a/tslib.es6.mjs
+++ b/tslib.es6.mjs
@@ -294,7 +294,7 @@ export function __classPrivateFieldIn(state, receiver) {
 
 export function __addDisposableResource(env, value, async) {
   if (value !== null && value !== void 0) {
-    if (typeof value !== "object") throw new TypeError("Object expected.");
+    if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
     var dispose;
     if (async) {
         if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tslib.js b/tslib.js
index 54c30ed..343ecde 100644
--- a/tslib.js
+++ b/tslib.js
@@ -342,7 +342,7 @@ var __disposeResources;
 
     __addDisposableResource = function (env, value, async) {
         if (value !== null && value !== void 0) {
-            if (typeof value !== "object") throw new TypeError("Object expected.");
+            if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
             var dispose;
             if (async) {
                 if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");