diff --git a/src/flask/__main__.py b/src/flask/__main__.py
index 33b6c380..4e28416e 100644
--- a/src/flask/__main__.py
+++ b/src/flask/__main__.py
@@ -1,3 +1,3 @@
 from .cli import main
 
-main(as_module=True)
+main()
diff --git a/src/flask/cli.py b/src/flask/cli.py
index 713d2b59..48c73763 100644
--- a/src/flask/cli.py
+++ b/src/flask/cli.py
@@ -953,10 +953,10 @@ debug mode.
 )
 
 
-def main(as_module=False):
+def main():
     # TODO omit sys.argv once https://github.com/pallets/click/issues/536 is fixed
-    cli.main(args=sys.argv[1:], prog_name="python -m flask" if as_module else None)
+    cli.main(args=sys.argv[1:])
 
 
 if __name__ == "__main__":
-    main(as_module=True)
+    main()