diff --git a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/forkid/ForkIdManager.java b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/forkid/ForkIdManager.java
index 6cb560192ef..61457b5bbce 100644
--- a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/forkid/ForkIdManager.java
+++ b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/forkid/ForkIdManager.java
@@ -70,7 +70,7 @@ public ForkIdManager(
             .collect(Collectors.toUnmodifiableList());
     this.timestampForks =
         timestampForks.stream()
-            .filter(fork -> fork > 0L)
+            .filter(fork -> fork > blockchain.getGenesisBlock().getHeader().getTimestamp())
             .distinct()
             .sorted()
             .collect(Collectors.toUnmodifiableList());
diff --git a/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTest.java b/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTest.java
index 5e7b28514d1..87f210bfa00 100644
--- a/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTest.java
+++ b/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTest.java
@@ -21,16 +21,19 @@
 import static org.hyperledger.besu.ethereum.forkid.ForkIdTestUtil.mockBlockchain;
 import static org.hyperledger.besu.ethereum.forkid.ForkIdTestUtil.wantPeerCheck;
 
+import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.ethereum.forkid.ForkIdTestUtil.ForkIds;
 import org.hyperledger.besu.ethereum.forkid.ForkIdTestUtil.GenesisHash;
 import org.hyperledger.besu.ethereum.forkid.ForkIdTestUtil.Network;
 import org.hyperledger.besu.ethereum.forkid.ForkIdTestUtil.PeerCheckCase;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Stream;
 
 import org.apache.tuweni.bytes.Bytes;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
@@ -603,4 +606,17 @@ public void test(
                             peerCheckCase.forkIdNext)))
                 .isEqualTo(peerCheckCase.want));
   }
+
+  @Test
+  public void testGenesisTimestampEqualToShanghaiTimestamp() {
+    final ForkIdManager forkIdManager =
+        new ForkIdManager(
+            mockBlockchain(Hash.ZERO.toHexString(), 10L, 0L),
+            Collections.emptyList(),
+            List.of(1L, 2L),
+            false);
+    assertThat(forkIdManager.getAllForkIds().size()).isEqualTo(2);
+    assertThat(forkIdManager.getAllForkIds().get(0).getNext()).isEqualTo(2L);
+    assertThat(forkIdManager.getAllForkIds().get(1).getNext()).isEqualTo(0L);
+  }
 }
diff --git a/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTestUtil.java b/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTestUtil.java
index d88d0fcd027..7fc23c2d475 100644
--- a/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTestUtil.java
+++ b/ethereum/core/src/test/java/org/hyperledger/besu/ethereum/forkid/ForkIdTestUtil.java
@@ -16,6 +16,7 @@
 
 import static java.util.Collections.emptyList;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
 import org.hyperledger.besu.datatypes.Hash;
@@ -44,7 +45,7 @@ public static Blockchain mockBlockchain(
       final String genesisHash, final LongSupplier chainHeightSupplier, final long timestamp) {
     final Blockchain mockchain = mock(Blockchain.class);
     final BlockHeader mockHeader = mock(BlockHeader.class);
-    final Block block = new Block(mockHeader, null);
+    final Block block = spy(new Block(mockHeader, null));
     final BlockHeader mockChainHeadHeader = mock(BlockHeader.class);
     when(mockchain.getGenesisBlock()).thenReturn(block);
     when(mockchain.getChainHeadBlockNumber()).thenReturn(chainHeightSupplier.getAsLong());
@@ -52,6 +53,9 @@ public static Blockchain mockBlockchain(
     when(mockchain.getChainHeadHeader()).thenReturn(mockChainHeadHeader);
     when(mockChainHeadHeader.getNumber()).thenReturn(chainHeightSupplier.getAsLong());
     when(mockChainHeadHeader.getTimestamp()).thenReturn(timestamp);
+    final BlockHeader mockGenesisBlockHeader = mock(BlockHeader.class);
+    when(block.getHeader()).thenReturn(mockGenesisBlockHeader);
+    when(mockGenesisBlockHeader.getTimestamp()).thenReturn(1L);
     return mockchain;
   }