diff --git a/packages/node/CHANGELOG.md b/packages/node/CHANGELOG.md
index 849b8b54f0..b6dab037b0 100644
--- a/packages/node/CHANGELOG.md
+++ b/packages/node/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- When there is no log data for fullBlock, it is determined as lightBlock. (#350)
+
 ## [5.1.6] - 2024-10-23
 ### Changed
 - Bump `@subql/common` dependency
diff --git a/packages/node/src/ethereum/api.ethereum.test.ts b/packages/node/src/ethereum/api.ethereum.test.ts
index 31ace2099a..5e2d1c5306 100644
--- a/packages/node/src/ethereum/api.ethereum.test.ts
+++ b/packages/node/src/ethereum/api.ethereum.test.ts
@@ -367,6 +367,10 @@ describe('Api.ethereum', () => {
     expect(isFullBlock(blockData)).toBeTruthy();
     expect(isFullBlock(lightBlock)).toBeFalsy();
 
+    // block with transactions, but no logs 4913287
+    const noLogBlockData = (await (ethApi as any).fetchBlock(4913287)).block;
+    expect(isFullBlock(noLogBlockData)).toBeTruthy();
+
     // block without transaction
     const block10001 = (await (ethApi as any).fetchBlock(10001)).block;
     const lightBlock10001 = (await (ethApi as any).fetchLightBlock(10001))
diff --git a/packages/node/src/ethereum/block.ethereum.ts b/packages/node/src/ethereum/block.ethereum.ts
index 5ba9d687b3..329b895df9 100644
--- a/packages/node/src/ethereum/block.ethereum.ts
+++ b/packages/node/src/ethereum/block.ethereum.ts
@@ -120,7 +120,7 @@ export function isFullBlock(block: BlockContent): block is EthereumBlock {
   // Light etherum block just contains transaction hashes for transactions.
   // If the block has no transactions then both types would be the same
 
-  if (block.transactions.length && block.logs.length) {
+  if (block.transactions.length) {
     return typeof (block as EthereumBlock).transactions[0] !== 'string';
   }
   return false;