diff --git a/packages/rpc-eth-client/src/eth-client.ts b/packages/rpc-eth-client/src/eth-client.ts
index 8285f178..840125c1 100644
--- a/packages/rpc-eth-client/src/eth-client.ts
+++ b/packages/rpc-eth-client/src/eth-client.ts
@@ -376,7 +376,7 @@ export class EthClient implements EthClientInterface {
   _handleGetBlockErrors (err: any): Array<null> {
     if (err.code === errors.SERVER_ERROR && err.error) {
       // Check null block error and return null array
-      if (err.error.message === NULL_BLOCK_ERROR) {
+      if (err.error.message.startsWith(NULL_BLOCK_ERROR)) {
         return [null];
       }
 
diff --git a/packages/util/src/misc.ts b/packages/util/src/misc.ts
index 5477e085..b44b2001 100644
--- a/packages/util/src/misc.ts
+++ b/packages/util/src/misc.ts
@@ -368,7 +368,7 @@ export class MonitoredStaticJsonRpcProvider extends providers.StaticJsonRpcProvi
     } catch (err: any) {
       // Ignore errors on fetching future blocks and if block is null (in case of filecoin)
       if (err.code === ethersErrors.SERVER_ERROR && err.error) {
-        if (err.error.message === FUTURE_BLOCK_ERROR || err.error.message === NULL_BLOCK_ERROR) {
+        if (err.error.message === FUTURE_BLOCK_ERROR || err.error.message.startsWith(NULL_BLOCK_ERROR)) {
           throw err;
         }
       }