diff --git a/ethers-core/src/types/chain.rs b/ethers-core/src/types/chain.rs
index 4f70e107..c31c45ba 100644
--- a/ethers-core/src/types/chain.rs
+++ b/ethers-core/src/types/chain.rs
@@ -124,7 +124,12 @@ impl Chain {
         // TODO: Add other chains which do not support EIP1559.
         matches!(
             self,
-            Chain::Optimism | Chain::OptimismKovan | Chain::Fantom | Chain::FantomTestnet
+            Chain::Optimism |
+                Chain::OptimismKovan |
+                Chain::Fantom |
+                Chain::FantomTestnet |
+                Chain::BinanceSmartChain |
+                Chain::BinanceSmartChainTestnet
         )
     }
 }