diff --git a/.changes/extension_fix.md b/.changes/extension_fix.md
new file mode 100644
index 000000000..84a75f9f4
--- /dev/null
+++ b/.changes/extension_fix.md
@@ -0,0 +1,5 @@
+---
+"wry": "patch"
+---
+
+Fix extension loading on Windows.
\ No newline at end of file
diff --git a/src/webview2/mod.rs b/src/webview2/mod.rs
index d351c202b..05c79b2c7 100644
--- a/src/webview2/mod.rs
+++ b/src/webview2/mod.rs
@@ -1252,8 +1252,9 @@ impl InnerWebView {
     for entry in fs::read_dir(extension_path)? {
       let path = entry?.path();
       let path_hs = HSTRING::from(path.as_path());
+      let handler = ProfileAddBrowserExtensionCompletedHandler::create(Box::new(|_, _| Ok(())));
 
-      profile.AddBrowserExtension(&path_hs, None)?;
+      profile.AddBrowserExtension(&path_hs, &handler)?;
     }
 
     Ok(())