diff --git a/Containerfile b/Containerfile
index a410af41..4c6e79da 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,6 +1,6 @@
 ARG IMAGE_NAME="${IMAGE_NAME:-silverblue}"
 ARG SOURCE_IMAGE="${SOURCE_IMAGE:-silverblue}"
-ARG SOURCE_ORG="${SOURCE_IMAGE:-fedora-ostree-desktops}"
+ARG SOURCE_ORG="${SOURCE_ORG:-fedora-ostree-desktops}"
 ARG BASE_IMAGE="quay.io/${SOURCE_ORG}/${SOURCE_IMAGE}"
 ARG FEDORA_MAJOR_VERSION="${FEDORA_MAJOR_VERSION:-38}"