diff --git a/src/TeamCitySharp/ActionTypes/BuildConfigs.cs b/src/TeamCitySharp/ActionTypes/BuildConfigs.cs
index cdcd4a0f..cafd67e5 100644
--- a/src/TeamCitySharp/ActionTypes/BuildConfigs.cs
+++ b/src/TeamCitySharp/ActionTypes/BuildConfigs.cs
@@ -101,12 +101,12 @@ public void SetConfigurationPauseStatus(BuildTypeLocator locator, bool isPaused)
 
         public void PostRawArtifactDependency(BuildTypeLocator locator, string rawXml)
         {
-            _caller.PostFormat<ArtifactDependency>(rawXml, HttpContentTypes.ApplicationXml, string.Empty, "/app/rest/buildTypes/{0}/artifact-dependencies", locator);
+            _caller.PostFormat(rawXml, HttpContentTypes.ApplicationXml, "/app/rest/buildTypes/{0}/artifact-dependencies", locator);
         }
 
         public void PostRawBuildStep(BuildTypeLocator locator, string rawXml)
         {
-            _caller.PostFormat<BuildConfig>(rawXml, HttpContentTypes.ApplicationXml, string.Empty, "/app/rest/buildTypes/{0}/steps", locator);
+            _caller.PostFormat(rawXml, HttpContentTypes.ApplicationXml, "/app/rest/buildTypes/{0}/steps", locator);
         }
 
         public void PostRawBuildTrigger(BuildTypeLocator locator, string rawXml)
diff --git a/src/TeamCitySharp/ActionTypes/VcsRoots.cs b/src/TeamCitySharp/ActionTypes/VcsRoots.cs
index 9e1e95a9..b418e053 100644
--- a/src/TeamCitySharp/ActionTypes/VcsRoots.cs
+++ b/src/TeamCitySharp/ActionTypes/VcsRoots.cs
@@ -33,7 +33,7 @@ public VcsRoot ById(string vcsRootId)
         public VcsRoot AttachVcsRoot(BuildTypeLocator locator, VcsRoot vcsRoot)
         {
             var xml = string.Format(@"<vcs-root-entry><vcs-root id=""{0}""/></vcs-root-entry>", vcsRoot.Id);
-            return _caller.PostFormat<VcsRoot>(xml, HttpContentTypes.ApplicationXml, string.Empty, "/app/rest/buildTypes/{0}/vcs-root-entries", locator);	
+            return _caller.PostFormat<VcsRoot>(xml, HttpContentTypes.ApplicationXml, HttpContentTypes.ApplicationXml, "/app/rest/buildTypes/{0}/vcs-root-entries", locator);	
         }
 
         public void DetachVcsRoot(BuildTypeLocator locator, string vcsRootId)