diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 9e8d1108e..cfe1057ac 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -930,7 +930,7 @@ namespace cryptonote
     {
       res.tx_hashes.push_back(epee::string_tools::pod_to_hex(blk.tx_hashes[n]));
     }
-    res.blob = t_serializable_object_to_blob(blk);
+    res.blob = string_tools::buff_to_hex_nodelimer(t_serializable_object_to_blob(blk));
     res.json = obj_to_json_str(blk);
     res.status = CORE_RPC_STATUS_OK;
     return true;