diff --git a/modules/swagger-codegen/src/main/resources/ruby/api_client.mustache b/modules/swagger-codegen/src/main/resources/ruby/api_client.mustache
index e3f54f10994..2ad1491ee1a 100644
--- a/modules/swagger-codegen/src/main/resources/ruby/api_client.mustache
+++ b/modules/swagger-codegen/src/main/resources/ruby/api_client.mustache
@@ -75,10 +75,11 @@ module {{moduleName}}
         :ssl_verifypeer => @config.verify_ssl,
         :sslcert => @config.cert_file,
         :sslkey => @config.key_file,
-        :cainfo => @config.ssl_ca_cert,
         :verbose => @config.debugging
       }
 
+      req_opts[:cainfo] = @config.ssl_ca_cert if @config.ssl_ca_cert
+
       if [:post, :patch, :put, :delete].include?(http_method)
         req_body = build_request_body(header_params, form_params, opts[:body])
         req_opts.update :body => req_body
diff --git a/samples/client/petstore/ruby/lib/petstore/api_client.rb b/samples/client/petstore/ruby/lib/petstore/api_client.rb
index e00be7176b0..09d5777f5e8 100644
--- a/samples/client/petstore/ruby/lib/petstore/api_client.rb
+++ b/samples/client/petstore/ruby/lib/petstore/api_client.rb
@@ -75,10 +75,11 @@ module Petstore
         :ssl_verifypeer => @config.verify_ssl,
         :sslcert => @config.cert_file,
         :sslkey => @config.key_file,
-        :cainfo => @config.ssl_ca_cert,
         :verbose => @config.debugging
       }
 
+      req_opts[:cainfo] = @config.ssl_ca_cert if @config.ssl_ca_cert
+
       if [:post, :patch, :put, :delete].include?(http_method)
         req_body = build_request_body(header_params, form_params, opts[:body])
         req_opts.update :body => req_body