diff --git a/lib/ansible/vars/__init__.py b/lib/ansible/vars/__init__.py
index 6e918d70e2..8dcb60ab32 100644
--- a/lib/ansible/vars/__init__.py
+++ b/lib/ansible/vars/__init__.py
@@ -459,7 +459,7 @@ class VariableManager:
 
             templar.set_available_variables(vars_copy)
             delegated_host_name = templar.template(task.delegate_to, fail_on_undefined=False)
-            if not delegated_host_name:
+            if delegated_host_name is None:
                 raise AnsibleError(message="Undefined delegate_to host for task:", obj=task._ds)
             if delegated_host_name in delegated_host_vars:
                 # no need to repeat ourselves, as the delegate_to value