diff --git a/.changes/fix-local-url-check.md b/.changes/fix-local-url-check.md
new file mode 100644
index 000000000..8132fe05a
--- /dev/null
+++ b/.changes/fix-local-url-check.md
@@ -0,0 +1,5 @@
+---
+"tauri": patch
+---
+
+Fixes check for local URL when an external URL is provided to the window and it is based on the configured devPath.
diff --git a/core/tauri/src/manager.rs b/core/tauri/src/manager.rs
index a010ca1f9..34846714b 100644
--- a/core/tauri/src/manager.rs
+++ b/core/tauri/src/manager.rs
@@ -1069,7 +1069,10 @@ impl<R: Runtime> WindowManager<R> {
           },
         )
       }
-      WindowUrl::External(url) => (url.scheme() == "tauri", url.clone()),
+      WindowUrl::External(url) => {
+        let config_url = self.get_url();
+        (config_url.make_relative(url).is_some(), url.clone())
+      }
       _ => unimplemented!(),
     };