diff --git a/adminsortable/utils.py b/adminsortable/utils.py
index e2948cf..c858f88 100644
--- a/adminsortable/utils.py
+++ b/adminsortable/utils.py
@@ -1,5 +1,17 @@
+from .models import Sortable
+
+
 def get_is_sortable(objects):
     if objects:
-        if objects.count() > 1:
-            return True
+        if issubclass(type(objects[0]), Sortable):
+            if objects.count() > 1:
+                return True
+    return False
+
+
+def check_model_is_sortable(cls):
+    if cls:
+        if issubclass(type(cls), Sortable):
+            if cls.objects.count() > 1:
+                return True
     return False