1 files changed, 1 insertions, 1 deletions
diff --git a/prefs.php b/prefs.php
index cc6267798..191f452c4 100644
--- a/prefs.php
+++ b/prefs.php
@@ -41,7 +41,7 @@
 
 	<?php if ($_SESSION["uid"]) {
 		$theme = get_pref( "USER_CSS_THEME", $_SESSION["uid"], false);
-		if ($theme && file_exists("themes/$theme")) {
+		if ($theme && theme_valid("$theme")) {
 			echo stylesheet_tag("themes/$theme");
 		} else {
 			echo stylesheet_tag("themes/default.css");