diff --git a/packages/backend-plugin-api/api-report.md b/packages/backend-plugin-api/api-report.md
index 23e9172bee..a798f1b1f7 100644
--- a/packages/backend-plugin-api/api-report.md
+++ b/packages/backend-plugin-api/api-report.md
@@ -125,7 +125,6 @@ export type BackstagePrincipalTypes = {
 export type BackstageServicePrincipal = {
   type: 'service';
   subject: string;
-  permissions?: string[];
 };
 
 // @public (undocumented)
diff --git a/packages/backend-plugin-api/src/services/definitions/AuthService.ts b/packages/backend-plugin-api/src/services/definitions/AuthService.ts
index 8eeb40a5ca..a35d5a5160 100644
--- a/packages/backend-plugin-api/src/services/definitions/AuthService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/AuthService.ts
@@ -38,9 +38,6 @@ export type BackstageServicePrincipal = {
 
   // Exact format TBD, possibly 'plugin:<pluginId>' or 'external:<externalServiceId>'
   subject: string;
-
-  // Not implemented in the first iteration, but this is how we might extend this in the future
-  permissions?: string[];
 };
 
 /**