diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index d9e426364..c0c49f556 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -1773,6 +1773,7 @@ namespace cryptonote
     }
 
     res.reserved_offset = reserved_offset;
+    res.unlock_height = b.miner_tx.unlock_time;
     store_difficulty(wdiff, res.difficulty, res.wide_difficulty, res.difficulty_top64);
     blobdata block_blob = t_serializable_object_to_blob(b);
     blobdata hashing_blob = get_block_hashing_blob(b);
diff --git a/src/rpc/core_rpc_server_commands_defs.h b/src/rpc/core_rpc_server_commands_defs.h
index 8748b0540..8907a63c3 100644
--- a/src/rpc/core_rpc_server_commands_defs.h
+++ b/src/rpc/core_rpc_server_commands_defs.h
@@ -914,6 +914,7 @@ namespace cryptonote
       std::string next_seed_hash;
       blobdata blocktemplate_blob;
       blobdata blockhashing_blob;
+      uint64_t unlock_height;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE_PARENT(rpc_response_base)
@@ -929,6 +930,7 @@ namespace cryptonote
         KV_SERIALIZE(blockhashing_blob)
         KV_SERIALIZE(seed_hash)
         KV_SERIALIZE(next_seed_hash)
+        KV_SERIALIZE(unlock_height)
       END_KV_SERIALIZE_MAP()
     };
     typedef epee::misc_utils::struct_init<response_t> response;