diff --git a/src/Stratis.Bitcoin.Features.RPC/RPCClient.cs b/src/Stratis.Bitcoin.Features.RPC/RPCClient.cs
index ae61b8901e9..dd615c66741 100644
--- a/src/Stratis.Bitcoin.Features.RPC/RPCClient.cs
+++ b/src/Stratis.Bitcoin.Features.RPC/RPCClient.cs
@@ -527,7 +527,9 @@ private async Task SendBatchAsyncCoreAsync(List<(RPCRequest request, TaskComplet
             try
             {
                 webResponse = await webRequest.GetResponseAsync().ConfigureAwait(false);
-                webResponse.ContentType = "application/json; charset=utf-8";
+                if (string.IsNullOrEmpty(webResponse.ContentType))
+                    webResponse.ContentType = "application/json; charset=utf-8";
+
                 response = JArray.Load(new JsonTextReader(
                         new StreamReader(
                                 await ToMemoryStreamAsync(webResponse.GetResponseStream()).ConfigureAwait(false), Encoding.UTF8)));