diff --git a/UI/Common/WODirectAction+SOGo.m b/UI/Common/WODirectAction+SOGo.m
index d6395ad33..ee6338da1 100644
--- a/UI/Common/WODirectAction+SOGo.m
+++ b/UI/Common/WODirectAction+SOGo.m
@@ -40,7 +40,7 @@
   response = [context response];
   [response setStatus: status];
   [response setHeader: @"text/plain; charset=utf-8" 
-	    forKey: @"Content-Type"];
+	    forKey: @"content-type"];
 
   return response;
 }
diff --git a/UI/SOGoUI/UIxComponent.m b/UI/SOGoUI/UIxComponent.m
index 8e5a5c7d6..e34621427 100644
--- a/UI/SOGoUI/UIxComponent.m
+++ b/UI/SOGoUI/UIxComponent.m
@@ -602,7 +602,6 @@ static BOOL uixDebugEnabled = NO;
 
   response = [context response];
   [response setStatus: status];
-  [response setHeader: @"text/plain" forKey: @"Content-Type"];
 
   return response;
 }