diff --git a/src/casl/casl-ability.factory.ts b/src/casl/casl-ability.factory.ts
index b2e3e1821..628beabf4 100644
--- a/src/casl/casl-ability.factory.ts
+++ b/src/casl/casl-ability.factory.ts
@@ -298,7 +298,7 @@ export class CaslAbilityFactory {
     );
 
     if (!user) {
-      cannot(Action.InstrumentRead, Instrument);
+      can(Action.InstrumentRead, Instrument);
       cannot(Action.InstrumentCreate, Instrument);
       cannot(Action.InstrumentUpdate, Instrument);
       cannot(Action.InstrumentDelete, Instrument);