From ee5ac6b800c16ad16fffe45c168df2a1434e7488 Mon Sep 17 00:00:00 2001
From: fragosti <francesco.agosti93@gmail.com>
Date: Mon, 9 Jul 2018 16:16:48 -0700
Subject: Fix unsubscribe bug

---
 packages/website/ts/blockchain.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'packages')

diff --git a/packages/website/ts/blockchain.ts b/packages/website/ts/blockchain.ts
index fde134b18..5476fcf37 100644
--- a/packages/website/ts/blockchain.ts
+++ b/packages/website/ts/blockchain.ts
@@ -537,7 +537,9 @@ export class Blockchain {
     }
     public destroy(): void {
         this._blockchainWatcher.destroy();
-        this._injectedProviderObservable.unsubscribe(this._injectedProviderUpdateHandler);
+        if (this._injectedProviderObservable) {
+            this._injectedProviderObservable.unsubscribe(this._injectedProviderUpdateHandler);
+        }
         this._stopWatchingExchangeLogFillEvents();
         this._stopWatchingGasPrice();
     }
-- 
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