diff --git a/index.php b/index.php
index f0010b7e..86666ee2 100644
--- a/index.php
+++ b/index.php
@@ -153,8 +153,11 @@ try {
 $_tracer->end();
 if (TRACE_FILE) {
     if (
-        (microtime(true) - $_shm_load_start) > TRACE_THRESHOLD
-        && ($_SERVER["REQUEST_URI"] ?? "") != "/upload"
+        empty($_SERVER["REQUEST_URI"])
+        || (
+            (microtime(true) - $_shm_load_start) > TRACE_THRESHOLD
+            && ($_SERVER["REQUEST_URI"] ?? "") != "/upload"
+        )
     ) {
         $_tracer->flush(TRACE_FILE);
     }