diff --git a/entrypoint.sh b/entrypoint.sh
index 6445434c..2eef93eb 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -32,6 +32,7 @@ export SCORECARD_RESULTS_FORMAT="$INPUT_RESULTS_FORMAT"
 export SCORECARD_PUBLISH_RESULTS="$INPUT_PUBLISH_RESULTS"
 # https://docs.github.com/en/actions/learn-github-actions/environment-variables
 export SCORECARD_PRIVATE_REPOSITORY="$(jq '.repository.private' $GITHUB_EVENT_PATH)"
+export SCORECARD_DEFAULT_BRANCH="refs/heads/$(jq -r '.repository.default_branch' $GITHUB_EVENT_PATH)"
 export SCORECARD_BIN="/scorecard"
 export ENABLED_CHECKS=
 
@@ -54,12 +55,13 @@ echo "Private repository: $SCORECARD_PRIVATE_REPOSITORY"
 echo "Publication enabled: $SCORECARD_PUBLISH_RESULTS"
 echo "Format: $SCORECARD_RESULTS_FORMAT"
 echo "Policy file: $SCORECARD_POLICY_FILE"
+echo "Default branch: $SCORECARD_DEFAULT_BRANCH"
 
 # Note: this will fail if we push to a branch on the same repo, so it will show as failing
 # on forked repos.
-if [[ "$GITHUB_EVENT_NAME" != "pull_request"* ]] && ! [[ "$GITHUB_REF" =~ ^refs/heads/(main|master)$ ]]; then
+if [[ "$GITHUB_EVENT_NAME" != "pull_request"* ]] && [[ "$GITHUB_REF" != "$SCORECARD_DEFAULT_BRANCH" ]]; then
     echo "$GITHUB_REF not supported with '$GITHUB_EVENT_NAME' event."
-    echo "Only the default branch is supported"
+    echo "Only the default branch '$SCORECARD_DEFAULT_BRANCH' is supported"
     exit 1
 fi