diff --git a/.changes/fix-remove-tempdir-unc-prefix.md b/.changes/fix-remove-tempdir-unc-prefix.md
new file mode 100644
index 00000000000..a709c171c12
--- /dev/null
+++ b/.changes/fix-remove-tempdir-unc-prefix.md
@@ -0,0 +1,5 @@
+---
+tauri: "patch:bug"
+---
+
+Fixed a regression that added the `\\?\` UNC prefix to the path returned from the `tempdir()` command.
diff --git a/core/tauri/src/endpoints/operating_system.rs b/core/tauri/src/endpoints/operating_system.rs
index 365cb4059e7..5511a68efba 100644
--- a/core/tauri/src/endpoints/operating_system.rs
+++ b/core/tauri/src/endpoints/operating_system.rs
@@ -42,7 +42,12 @@ impl Cmd {
   }
 
   fn tempdir<R: Runtime>(_context: InvokeContext<R>) -> super::Result<PathBuf> {
-    Ok(std::env::temp_dir().canonicalize()?)
+    #[cfg(windows)]
+    use dunce::canonicalize;
+    #[cfg(not(windows))]
+    use std::fs::canonicalize;
+
+    Ok(canonicalize(std::env::temp_dir())?)
   }
 
   fn locale<R: Runtime>(_context: InvokeContext<R>) -> super::Result<Option<String>> {