diff --git a/ext/upload/main.php b/ext/upload/main.php
index d6396b12..91429cf2 100644
--- a/ext/upload/main.php
+++ b/ext/upload/main.php
@@ -332,7 +332,7 @@ class Upload extends Extension {
 
 		// PHP falls back to system default if /tmp fails, can't we just
 		// use the system default to start with? :-/
-		$tmp_filename = tempnam("/tmp", "shimmie_transload");
+		$tmp_filename = tempnam(ini_get('upload_tmp_dir'), "shimmie_transload");
 		$filename = basename($url);
 
 		if(!transload($url, $tmp_filename)) {