diff --git a/app/controllers/api/functions.php b/app/controllers/api/functions.php
index f70895ad60..3232f6bfe1 100644
--- a/app/controllers/api/functions.php
+++ b/app/controllers/api/functions.php
@@ -431,12 +431,12 @@ App::get('/v1/functions/runtimes')
         $allowList = \array_filter(\explode(',', System::getEnv('_APP_FUNCTIONS_RUNTIMES', '')));
 
         $allowed = [];
-        foreach ($runtimes as $key => $runtime) {
-            if (!empty($allowList) && !\in_array($key, $allowList)) {
+        foreach ($runtimes as $id => $runtime) {
+            if (!empty($allowList) && !\in_array($id, $allowList)) {
                 continue;
             }
 
-            $runtime['$id'] = $key;
+            $runtime['$id'] = $id;
             $allowed[] = $runtime;
         }