diff --git a/packages/protocol/contracts/layer1/based/LibProving.sol b/packages/protocol/contracts/layer1/based/LibProving.sol
index 0c96335ec8d..3ead8de2ed5 100644
--- a/packages/protocol/contracts/layer1/based/LibProving.sol
+++ b/packages/protocol/contracts/layer1/based/LibProving.sol
@@ -34,6 +34,7 @@ library LibProving {
         bool sameTransition;
         bool postFork;
         uint64 proposedAt;
+        bool isSyncBlock;
     }
 
     /// @notice Emitted when a transition is proved.
@@ -261,7 +262,9 @@ library LibProving {
 
         local.proposedAt = local.postFork ? local.meta.proposedAt : blk.proposedAt;
 
-        if (LibUtils.shouldSyncStateRoot(_config.stateRootSyncInternal, local.blockId)) {
+        local.isSyncBlock =
+            LibUtils.shouldSyncStateRoot(_config.stateRootSyncInternal, local.blockId);
+        if (local.isSyncBlock) {
             local.stateRoot = ctx_.tran.stateRoot;
         }
 
@@ -367,8 +370,9 @@ library LibProving {
 
         local.isTopTier = local.tier.contestBond == 0;
 
-        local.sameTransition =
-            ctx_.tran.blockHash == ts.blockHash && local.stateRoot == ts.stateRoot;
+        local.sameTransition = local.isSyncBlock
+            ? ctx_.tran.blockHash == ts.blockHash && local.stateRoot == ts.stateRoot
+            : ctx_.tran.blockHash == ts.blockHash;
 
         if (local.proof.tier > ts.tier) {
             // Handles the case when an incoming tier is higher than the current transition's tier.