diff --git a/lib/webmock/http_lib_adapters/httpclient.rb b/lib/webmock/http_lib_adapters/httpclient.rb
index 6d8402439..674a4946f 100644
--- a/lib/webmock/http_lib_adapters/httpclient.rb
+++ b/lib/webmock/http_lib_adapters/httpclient.rb
@@ -119,7 +119,7 @@ def build_request_signature(req)
     request_signature = WebMock::RequestSignature.new(
       req.header.request_method.downcase.to_sym,
       uri.to_s,
-      :body => req.body.content,
+      :body => req.content,
       :headers => headers
     )
   end