diff --git a/crates/p2p/src/client/conv.rs b/crates/p2p/src/client/conv.rs
index dde63a667..0fdde1d21 100644
--- a/crates/p2p/src/client/conv.rs
+++ b/crates/p2p/src/client/conv.rs
@@ -132,8 +132,8 @@ impl ToDto<p2p_proto::header::SignedBlockHeader> for SignedBlockHeader {
             gas_price_wei: self.header.eth_l1_gas_price.0,
             data_gas_price_fri: self.header.strk_l1_data_gas_price.0,
             data_gas_price_wei: self.header.eth_l1_data_gas_price.0,
-            l2_gas_price_fri: self.header.strk_l2_gas_price.0,
-            l2_gas_price_wei: self.header.eth_l2_gas_price.0,
+            l2_gas_price_fri: Some(self.header.strk_l2_gas_price.0),
+            l2_gas_price_wei: Some(self.header.eth_l2_gas_price.0),
             l1_data_availability_mode: self.header.l1_da_mode.to_dto(),
             signatures: vec![p2p_proto::common::ConsensusSignature {
                 r: self.signature.r.0,
diff --git a/crates/p2p/src/client/types.rs b/crates/p2p/src/client/types.rs
index 2dc254c5e..a3b28157f 100644
--- a/crates/p2p/src/client/types.rs
+++ b/crates/p2p/src/client/types.rs
@@ -101,8 +101,8 @@ impl TryFromDto<p2p_proto::header::SignedBlockHeader> for SignedBlockHeader {
                 strk_l1_gas_price: GasPrice(dto.gas_price_fri),
                 eth_l1_data_gas_price: GasPrice(dto.data_gas_price_wei),
                 strk_l1_data_gas_price: GasPrice(dto.data_gas_price_fri),
-                eth_l2_gas_price: GasPrice(dto.l2_gas_price_wei),
-                strk_l2_gas_price: GasPrice(dto.l2_gas_price_fri),
+                eth_l2_gas_price: GasPrice(dto.l2_gas_price_wei.unwrap_or_default()),
+                strk_l2_gas_price: GasPrice(dto.l2_gas_price_fri.unwrap_or_default()),
                 sequencer_address: SequencerAddress(dto.sequencer_address.0),
                 starknet_version: dto.protocol_version.parse()?,
                 event_commitment: EventCommitment(dto.events.root.0),
diff --git a/crates/p2p_proto/src/header.rs b/crates/p2p_proto/src/header.rs
index 61b6c685b..792953d3c 100644
--- a/crates/p2p_proto/src/header.rs
+++ b/crates/p2p_proto/src/header.rs
@@ -34,8 +34,10 @@ pub struct SignedBlockHeader {
     pub gas_price_wei: u128,
     pub data_gas_price_fri: u128,
     pub data_gas_price_wei: u128,
-    pub l2_gas_price_fri: u128,
-    pub l2_gas_price_wei: u128,
+    #[optional]
+    pub l2_gas_price_fri: Option<u128>,
+    #[optional]
+    pub l2_gas_price_wei: Option<u128>,
     pub l1_data_availability_mode: L1DataAvailabilityMode,
     pub signatures: Vec<ConsensusSignature>,
 }