diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
index 37f5cce37a..01c303eb7e 100644
--- a/django/db/models/sql/compiler.py
+++ b/django/db/models/sql/compiler.py
@@ -740,7 +740,7 @@ class SQLCompiler:
             return chain(direct_choices, reverse_choices)
 
         related_klass_infos = []
-        if not restricted and self.query.max_depth and cur_depth > self.query.max_depth:
+        if not restricted and cur_depth > self.query.max_depth:
             # We've recursed far enough; bail out.
             return related_klass_infos