diff --git a/app/Support/Authentication/RemoteUserGuard.php b/app/Support/Authentication/RemoteUserGuard.php
index 7a333e7006..3f7b049253 100644
--- a/app/Support/Authentication/RemoteUserGuard.php
+++ b/app/Support/Authentication/RemoteUserGuard.php
@@ -67,9 +67,9 @@ class RemoteUserGuard implements Guard
 
             return;
         }
-        // Get the user identifier from $_SERVER
+        // Get the user identifier from $_SERVER or apache filtered headers
         $header = config('auth.guard_header', 'REMOTE_USER');
-        $userID = request()->server($header) ?? null;
+        $userID = request()->server($header) ?? apache_request_headers()[$header] ?? null;
         if (null === $userID) {
             Log::error(sprintf('No user in header "%s".', $header));
             throw new FireflyException('The guard header was unexpectedly empty. See the logs.');