diff --git a/owlps-positioner/resultlist.hh b/owlps-positioner/resultlist.hh
index eb2a404..cba973c 100644
--- a/owlps-positioner/resultlist.hh
+++ b/owlps-positioner/resultlist.hh
@@ -113,4 +113,15 @@ inline void ResultList::set_request(const Request *const _request)
 
 
 
+
+/* *** Write accessors *** */
+
+
+inline bool ResultList::operator!=(const ResultList &source) const
+{
+  return !this->operator==(source);
+}
+
+
+
 #endif // _OWLPS_POSITIONING_RESULTLIST_HH_