diff --git a/src/metkit/mars/MarsRequest.h b/src/metkit/mars/MarsRequest.h
index bb826eb..318d7bd 100644
--- a/src/metkit/mars/MarsRequest.h
+++ b/src/metkit/mars/MarsRequest.h
@@ -73,7 +73,9 @@ class MarsRequest {
 
     void getParams(std::vector<std::string>&) const;
     std::vector<std::string> params() const;
-    
+
+    std::list<Parameter>& parameters() { return params_; }
+
     const std::list<Parameter>& parameters() const { return params_; }
 
     void verb(const std::string&);