diff --git a/crypto_dev_signer/eth/web3ext/middleware.py b/crypto_dev_signer/eth/web3ext/middleware.py
index c3c64fa..d3cdb71 100644
--- a/crypto_dev_signer/eth/web3ext/middleware.py
+++ b/crypto_dev_signer/eth/web3ext/middleware.py
@@ -29,7 +29,7 @@ class PlatformMiddleware:
     def __init__(self, make_request, w3):
         self.w3 = w3 
         self.make_request = make_request
-        if ipcaddr == None:
+        if self.ipcaddr == None:
             raise AttributeError('ipcaddr not set')