diff --git a/.changeset/eleven-apricots-wave.md b/.changeset/eleven-apricots-wave.md
new file mode 100644
index 0000000000..7abd44bf1c
--- /dev/null
+++ b/.changeset/eleven-apricots-wave.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-permission-node': patch
+---
+
+Fixed an issue causing `ServerPermissionClient` to generate an invalid token for authorizing permissions against the permission backend.