diff --git a/consensus/src/pipeline/header_processor/pre_pow_validation.rs b/consensus/src/pipeline/header_processor/pre_pow_validation.rs
index 45f146f..e20a4df 100644
--- a/consensus/src/pipeline/header_processor/pre_pow_validation.rs
+++ b/consensus/src/pipeline/header_processor/pre_pow_validation.rs
@@ -50,8 +50,9 @@ impl HeaderProcessor {
             .calculate_difficulty_bits(ghostdag_data, &daa_window);
         ctx.mergeset_non_daa = Some(daa_window.mergeset_non_daa);
 
-        if header.daa_score <= (self.hf_daa_score + 10) && header.daa_score >= self.hf_daa_score {
-            //    if virtual_state.daa_score < (self.hf_daa_score + 10) || virtual_state.daa_score >=  self.hf_daa_score {
+        if header.daa_score <= (self.hf_daa_score + self.difficulty_window_size as u64)
+            && header.daa_score >= self.hf_daa_score
+        {
             expected_bits = self.genesis.bits;
         }
 
diff --git a/consensus/src/pipeline/header_processor/processor.rs b/consensus/src/pipeline/header_processor/processor.rs
index a9d6e5c..4065003 100644
--- a/consensus/src/pipeline/header_processor/processor.rs
+++ b/consensus/src/pipeline/header_processor/processor.rs
@@ -127,6 +127,7 @@ pub struct HeaderProcessor {
     pub(super) skip_proof_of_work: bool,
     pub(super) max_block_level: BlockLevel,
     pub(super) hf_daa_score: u64,
+    pub(super) difficulty_window_size: usize,
 
     // DB
     db: Arc<DB>,
@@ -217,6 +218,7 @@ impl HeaderProcessor {
             skip_proof_of_work: params.skip_proof_of_work,
             max_block_level: params.max_block_level,
             hf_daa_score: params.hf_daa_score,
+            difficulty_window_size: params.legacy_difficulty_window_size,
         }
     }
 
diff --git a/consensus/src/pipeline/virtual_processor/processor.rs b/consensus/src/pipeline/virtual_processor/processor.rs
index 247141c..b4452a4 100644
--- a/consensus/src/pipeline/virtual_processor/processor.rs
+++ b/consensus/src/pipeline/virtual_processor/processor.rs
@@ -124,6 +124,7 @@ pub struct VirtualStateProcessor {
     pub(super) mergeset_size_limit: u64,
     pub(super) pruning_depth: u64,
     pub(super) hf_daa_score: u64,
+    pub(super) difficulty_window_size: usize,
 
     // Stores
     pub(super) statuses_store: Arc<RwLock<DbStatusesStore>>,
@@ -199,6 +200,7 @@ impl VirtualStateProcessor {
             mergeset_size_limit: params.mergeset_size_limit,
             pruning_depth: params.pruning_depth,
             hf_daa_score: params.hf_daa_score,
+            difficulty_window_size: params.legacy_difficulty_window_size,
 
             db,
             statuses_store: storage.statuses_store.clone(),
@@ -1226,7 +1228,7 @@ impl VirtualStateProcessor {
         };
         // todo: check bits to lower difficulty
         let mut bits = virtual_state.bits;
-        if virtual_state.daa_score <= (self.hf_daa_score + 10)
+        if virtual_state.daa_score <= (self.hf_daa_score + self.difficulty_window_size as u64)
             && virtual_state.daa_score >= self.hf_daa_score
         {
             bits = self.genesis.bits;