diff --git a/packages/api-derive/src/session/info.ts b/packages/api-derive/src/session/info.ts
index 7bf96d01bf..919c3a55bd 100644
--- a/packages/api-derive/src/session/info.ts
+++ b/packages/api-derive/src/session/info.ts
@@ -35,6 +35,7 @@ function queryAura (api: ApiInterfaceRx): Observable<DeriveSessionInfo> {
         [
           false,
           api.registry.createType('u64', 1),
+          // we may have aura without staking (permissioned)
           api.consts.staking?.sessionsPerEra || api.registry.createType('SessionIndex', 1)
         ],
         indexes
@@ -51,9 +52,7 @@ function queryBabe (api: ApiInterfaceRx): Observable<DeriveSessionInfo> {
           true,
           api.consts.babe.epochDuration,
           // we may have babe without staking (permissioned)
-          api.consts.staking
-            ? api.consts.staking.sessionsPerEra
-            : api.registry.createType('SessionIndex')
+          api.consts.staking?.sessionsPerEra || api.registry.createType('SessionIndex', 1)
         ],
         indexes
       ])