diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
index 30e9b241c8..0b75a9a7b4 100644
--- a/django/db/models/sql/compiler.py
+++ b/django/db/models/sql/compiler.py
@@ -1104,14 +1104,11 @@ class SQLUpdateCompiler(SQLCompiler):
 
 
 class SQLAggregateCompiler(SQLCompiler):
-    def as_sql(self, compiler=None):
+    def as_sql(self):
         """
         Creates the SQL for this query. Returns the SQL string and list of
         parameters.
         """
-        if compiler is None:
-            compiler = self
-
         sql, params = [], []
         for annotation in self.query.annotation_select.values():
             agg_sql, agg_params = self.compile(annotation)