diff --git a/tauri/src/app/runner.rs b/tauri/src/app/runner.rs
index 175b8e235..6a3db9bfb 100644
--- a/tauri/src/app/runner.rs
+++ b/tauri/src/app/runner.rs
@@ -85,7 +85,15 @@ pub(crate) fn run(application: &mut crate::App) {
         webview.eval("
           if (window.onTauriInit !== void 0) {
             window.onTauriInit()
+            window.onTauriInit = void 0
           }
+          Object.defineProperty(window, 'onTauriInit', {
+            set: function(val) {
+              if (typeof(val) === 'function') {
+                val()
+              }
+            }
+          })
         ").expect("failed to evaluate window.onTauriInit");
       } else if !crate::endpoints::handle(webview, arg) {
         application.run_invoke_handler(webview, arg);