diff --git a/indexer_service/protocol/src/convert.rs b/indexer_service/protocol/src/convert.rs
index b6d9d348..8c6de2f4 100644
--- a/indexer_service/protocol/src/convert.rs
+++ b/indexer_service/protocol/src/convert.rs
@@ -606,7 +606,7 @@ impl TryFrom<common::block::Block> for Block {
             header: header.into(),
             body: body.try_into()?,
             bedrock_status: bedrock_status.into(),
-            bedrock_parent_id: MsgId(bedrock_parent_id),
+            bedrock_parent_id: MantleMsgId(bedrock_parent_id),
         })
     }
 }
diff --git a/indexer_service/protocol/src/lib.rs b/indexer_service/protocol/src/lib.rs
index 627d8513..f12bdf5b 100644
--- a/indexer_service/protocol/src/lib.rs
+++ b/indexer_service/protocol/src/lib.rs
@@ -36,7 +36,7 @@ pub struct Block {
     pub header: BlockHeader,
     pub body: BlockBody,
     pub bedrock_status: BedrockStatus,
-    pub bedrock_parent_id: MsgId,
+    pub bedrock_parent_id: MantleMsgId,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize, JsonSchema)]
@@ -190,7 +190,7 @@ pub struct Hash(
 );
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize, JsonSchema)]
-pub struct MsgId(
+pub struct MantleMsgId(
     #[serde(with = "base64::arr")]
     #[schemars(with = "String", description = "base64-encoded Bedrock message id")]
     pub [u8; 32],