diff --git a/mod/pretheme.php b/mod/pretheme.php
deleted file mode 100644
index 14d1f2b9ea..0000000000
--- a/mod/pretheme.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-use Friendica\App;
-use Friendica\Core\Theme;
-
-function pretheme_init(App $a) {
-
-	if ($_REQUEST['theme']) {
-		$theme = $_REQUEST['theme'];
-		$info = Theme::getInfo($theme);
-		if ($info) {
-			// unfortunately there will be no translation for this string
-			$desc = $info['description'];
-			$version = $info['version'];
-			$credits = $info['credits'];
-		} else {
-			$desc = '';
-			$version = '';
-			$credits = '';
-		}
-		echo json_encode(['img' => Theme::getScreenshot($theme), 'desc' => $desc, 'version' => $version, 'credits' => $credits]);
-	}
-
-	exit();
-}
diff --git a/src/App/Router.php b/src/App/Router.php
index 1dffb6b406..40f2d5ebcc 100644
--- a/src/App/Router.php
+++ b/src/App/Router.php
@@ -153,6 +153,7 @@ class Router
 			$collector->addRoute(['GET'], '/{type}/{name}',                      Module\Photo::class);
 			$collector->addRoute(['GET'], '/{type}/{customize}/{name}',          Module\Photo::class);
 		});
+		$this->routeCollector->addRoute(['GET'],         '/pretheme',            Module\ThemeDetails::class);
 		$this->routeCollector->addGroup('/profile', function (RouteCollector $collector) {
 			$collector->addRoute(['GET'], '/{nickname}',                         Module\Profile::class);
 			$collector->addRoute(['GET'], '/{profile:\d+}/view',                 Module\Profile::class);
diff --git a/src/Module/ThemeDetails.php b/src/Module/ThemeDetails.php
new file mode 100644
index 0000000000..7b53d1cfde
--- /dev/null
+++ b/src/Module/ThemeDetails.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Core\Theme;
+
+/**
+ * Prints theme specific details as a JSON string
+ */
+class ThemeDetails extends BaseModule
+{
+	public static function rawContent()
+	{
+		if (!empty($_REQUEST['theme'])) {
+			$theme = $_REQUEST['theme'];
+			$info = Theme::getInfo($theme);
+
+			// Unfortunately there will be no translation for this string
+			$description = defaults($info, 'description', '');
+			$version     = defaults($info, 'version'    , '');
+			$credits     = defaults($info, 'credits'    , '');
+
+			echo json_encode([
+				'img'     => Theme::getScreenshot($theme),
+				'desc'    => $description,
+				'version' => $version,
+				'credits' => $credits,
+			]);
+		}
+		exit();
+	}
+}