diff --git a/src/private/httpwriter.hxx b/src/private/httpwriter.hxx
index 51aa661..7440133 100644
--- a/src/private/httpwriter.hxx
+++ b/src/private/httpwriter.hxx
@@ -89,7 +89,7 @@ public:
             const QByteArray& field = cit.key();
             const QByteArray& value = cit.value();
 
-            writeHeader(field, value);
+            this->writeHeader(field, value);
         });
 
         isocket.writeRaw("\r\n");