diff --git a/supysonic/api/__init__.py b/supysonic/api/__init__.py
index 972ccf3..ecc419c 100644
--- a/supysonic/api/__init__.py
+++ b/supysonic/api/__init__.py
@@ -82,7 +82,7 @@ def get_client_prefs():
 
 
 def get_entity(cls, param="id"):
-    eid = get_entity_id(request.values[param])
+    eid = get_entity_id(cls, request.values[param])
     if eid is None:
         return
     entity = cls[eid]