diff --git a/.github/containers/trafficserver-alpine/docker-compose.yml b/.github/containers/trafficserver-alpine/docker-compose.yml
index df0ac1f441..321ddc570c 100644
--- a/.github/containers/trafficserver-alpine/docker-compose.yml
+++ b/.github/containers/trafficserver-alpine/docker-compose.yml
@@ -42,4 +42,4 @@ services:
           - linux/amd64
           - linux/arm64
     # for example, ghcr.io/apache/trafficcontrol/ci/trafficserver-alpine:9.1.2
-    image: ${CONTAINER:-ghcr.io/${GITHUB_REPOSITORY}/ci/trafficserver-alpine}:${ATS_VERSION}
+    image: ${CONTAINER:-ghcr.io/${GITHUB_REPOSITORY:-apache/trafficcontrol}/ci/trafficserver-alpine}:${ATS_VERSION}