diff --git a/src/asyncLocalStorage.ts b/src/asyncLocalStorage.ts
index 4a91d52..16856d5 100644
--- a/src/asyncLocalStorage.ts
+++ b/src/asyncLocalStorage.ts
@@ -6,17 +6,18 @@ interface IAsyncLocalStorage {
 }
 
 export const AsyncLocalStorage: IAsyncLocalStorage = {
+  // must use wrapper functions when passing localStorage functions (https://github.com/agilgur5/mst-persist/issues/18)
   clear () {
-    return callWithPromise(window.localStorage.clear)
+    return callWithPromise(() => window.localStorage.clear())
   },
   getItem (key) {
-    return callWithPromise(window.localStorage.getItem, key)
+    return callWithPromise(() => window.localStorage.getItem(key))
   },
   removeItem (key) {
-    return callWithPromise(window.localStorage.removeItem, key)
+    return callWithPromise(() => window.localStorage.removeItem(key))
   },
   setItem (key, value) {
-    return callWithPromise(window.localStorage.setItem, key, value)
+    return callWithPromise(() => window.localStorage.setItem(key, value))
   }
 }