diff --git a/fedora-iot-base.json b/fedora-iot-base.json
index 7140481..ba1d7f9 100644
--- a/fedora-iot-base.json
+++ b/fedora-iot-base.json
@@ -2,6 +2,8 @@
     "ref": "fedora/rawhide/${basearch}/iot",
     "ex-jigdo-spec": "fedora-iot.spec",
 
+    "min-free-space-size": "1TB",
+
     "repos": [],
 
     "selinux": true,