diff --git a/Source/Engine/Gramambular/Node.h b/Source/Engine/Gramambular/Node.h
index c167083a..d4b7b432 100644
--- a/Source/Engine/Gramambular/Node.h
+++ b/Source/Engine/Gramambular/Node.h
@@ -90,7 +90,7 @@ namespace Formosa {
             , m_selectedUnigramIndex(0)
             , m_score(0.0)
         {
-            sort(m_unigrams.begin(), m_unigrams.end(), Unigram::ScoreCompare);
+            stable_sort(m_unigrams.begin(), m_unigrams.end(), Unigram::ScoreCompare);
             
             if (m_unigrams.size()) {
                 m_score = m_unigrams[0].score;
diff --git a/Source/InputMethodController.mm b/Source/InputMethodController.mm
index 81a046f6..d7ad2119 100644
--- a/Source/InputMethodController.mm
+++ b/Source/InputMethodController.mm
@@ -1043,7 +1043,7 @@ public:
     vector<NodeAnchor> nodes = _builder->grid().nodesCrossingOrEndingAt(cursorIndex);
     
     // sort the nodes, so that longer nodes (representing longer phrases) are placed at the top of the candidate list
-    sort(nodes.begin(), nodes.end(), NodeAnchorDescendingSorter());
+    stable_sort(nodes.begin(), nodes.end(), NodeAnchorDescendingSorter());
     
     // then use the C++ trick to retrieve the candidates for each node at/crossing the cursor
     for (vector<NodeAnchor>::iterator ni = nodes.begin(), ne = nodes.end(); ni != ne; ++ni) {