diff --git a/routing_algorithms/map_matching.hpp b/routing_algorithms/map_matching.hpp
index 03ec5d097..2f1e618c1 100644
--- a/routing_algorithms/map_matching.hpp
+++ b/routing_algorithms/map_matching.hpp
@@ -484,7 +484,7 @@ template <class DataFacadeT> class MapMatching final
                 if (trace_split)
                 {
                     split_points.push_back(breakage_begin);
-                    // note this preserves everything before t
+                    // note: this preserves everything before breakage_begin
                     model.clear(breakage_begin);
                     unsigned new_start = model.initialize(breakage_begin);
                     // no new start was found -> stop viterbi calculation