diff --git a/src/allmydata/scripts/admin.py b/src/allmydata/scripts/admin.py
index 0ac3c6479..d9e45149b 100644
--- a/src/allmydata/scripts/admin.py
+++ b/src/allmydata/scripts/admin.py
@@ -125,7 +125,6 @@ def add_grid_manager_cert(options):
         return 1
 
     config.set_config("storage", "grid_management", "True")
-    config.add_section("grid_manager_certificates")
     config.set_config("grid_manager_certificates", cert_name, cert_fname)
 
     # write all the data out