diff --git a/Octokit/Http/Connection.cs b/Octokit/Http/Connection.cs
index 11a67d4502..2d643d64f2 100644
--- a/Octokit/Http/Connection.cs
+++ b/Octokit/Http/Connection.cs
@@ -596,7 +596,8 @@ public async Task<HttpStatusCode> Delete(Uri uri, object data)
                 Method = HttpMethod.Delete,
                 Body = data,
                 BaseAddress = BaseAddress,
-                Endpoint = uri
+                Endpoint = uri,
+                ContentType = "application/json"
             };
             var response = await Run<object>(request, CancellationToken.None).ConfigureAwait(false);
             return response.HttpResponse.StatusCode;