diff --git a/.changeset/slow-mirrors-eat.md b/.changeset/slow-mirrors-eat.md
new file mode 100644
index 0000000000..59e0c38484
--- /dev/null
+++ b/.changeset/slow-mirrors-eat.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-auth-backend': patch
+---
+
+oauth callbacks to consider installations with relative_url