From f145fe7c8bc9d5794395ae16ae2aea2c05061b39 Mon Sep 17 00:00:00 2001
From: Jaco Greeff <jacogr@gmail.com>
Date: Thu, 3 Oct 2019 22:46:31 +0200
Subject: [PATCH] Fix isGenesisSlot (only on Babe) (#1443)

---
 packages/api-derive/src/session/info.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/api-derive/src/session/info.ts b/packages/api-derive/src/session/info.ts
index 9cb7fc8fa9..763125341c 100644
--- a/packages/api-derive/src/session/info.ts
+++ b/packages/api-derive/src/session/info.ts
@@ -108,7 +108,7 @@ export function info (api: ApiInterfaceRx): () => Observable<DerivedSessionInfo>
           // https://github.com/paritytech/substrate/pull/2802/files#diff-5e5e1c3aec9ddfde0a9054d062ab3db9R156
           of([
             hasBabe,
-            !!api.query.babe.genesisSlot,
+            hasBabe && !!api.query.babe.genesisSlot,
             hasBabe
               ? api.consts.babe.epochDuration
               : ONE,