diff --git a/app/modules/prover/lib/blockGenerator.ts b/app/modules/prover/lib/blockGenerator.ts
index 55e9161f772bb23f7060d96a0218a6a442c448aa..ce2ebed4730f3a83b3cfff8f216e77c36765f3e8 100644
--- a/app/modules/prover/lib/blockGenerator.ts
+++ b/app/modules/prover/lib/blockGenerator.ts
@@ -653,7 +653,7 @@ export class BlockGenerator {
       transactions.forEach((tx:any) => {
         const txDTO = TransactionDTO.fromJSONObject(tx)
         const txLen = txDTO.getLen()
-        if (txLen <= CommonConstants.MAXIMUM_LEN_OF_COMPACT_TX && blockLen + txLen <= maxLenOfBlock && tx.version == CommonConstants.TRANSACTION_VERSION) {
+        if (txLen <= CommonConstants.MAXIMUM_LEN_OF_COMPACT_TX && blockLen + txLen < maxLenOfBlock && tx.version == CommonConstants.TRANSACTION_VERSION) {
           block.transactions.push(txDTO);
         }
         blockLen += txLen;