diff --git a/maps/bin/spt3g-coadd-maps b/maps/bin/spt3g-coadd-maps
index 330a7b42..04055c75 100644
--- a/maps/bin/spt3g-coadd-maps
+++ b/maps/bin/spt3g-coadd-maps
@@ -26,10 +26,10 @@ P.add_argument(
 )
 P.add_argument("-i", "--output-map-id", help="Id for output coadd map frame")
 P.add_argument(
-    "-w",
-    "--weighted",
-    action="store_true",
-    help="Ensure that weights are applied before coadding.",
+    "--no-check-weighted",
+    dest="weighted",
+    action="store_false",
+    help="Do not check that weights are applied before coadding.",
 )
 
 args = P.parse_args()
diff --git a/maps/python/map_modules.py b/maps/python/map_modules.py
index 603aaf60..325222b5 100644
--- a/maps/python/map_modules.py
+++ b/maps/python/map_modules.py
@@ -575,7 +575,7 @@ def coadd_map_files(
     map_ids=None,
     collate=False,
     output_map_id="Coadd",
-    weighted=False,
+    weighted=True,
 ):
     """
     Coadd map files, optionally collating map Id's into separate frames.