diff --git a/src/hooks/starknet-react.ts b/src/hooks/starknet-react.ts
index 9deb4511..5e62e30c 100644
--- a/src/hooks/starknet-react.ts
+++ b/src/hooks/starknet-react.ts
@@ -46,7 +46,7 @@ export const useAccountDetails = (): {
   })
 
   const chainId = useMemo(() => {
-    if (!connectedChainId || !connectedChainId.data) return undefined
+    if (!connectedChainId || !connectedChainId.data) return ChainId.MAINNET
     return connectedChainId.data
   }, [connectedChainId, address])