diff --git a/src/keymap_manager.cc b/src/keymap_manager.cc
index 74323a84..668af430 100644
--- a/src/keymap_manager.cc
+++ b/src/keymap_manager.cc
@@ -6,9 +6,9 @@
 namespace Kakoune
 {
 
-void KeymapManager::map_key(Key key, KeymapMode mode, std::vector<Key> mapping)
+void KeymapManager::map_key(Key key, KeymapMode mode, KeyList mapping)
 {
-    m_mapping[{key, mode}] = mapping;
+    m_mapping[{key, mode}] = std::move(mapping);
 }
 
 void KeymapManager::unmap_key(Key key, KeymapMode mode)
diff --git a/src/keymap_manager.hh b/src/keymap_manager.hh
index b7f7019b..09ae48d1 100644
--- a/src/keymap_manager.hh
+++ b/src/keymap_manager.hh
@@ -29,7 +29,8 @@ class KeymapManager
 public:
     KeymapManager(KeymapManager& parent) : m_parent(&parent) {}
 
-    void map_key(Key key, KeymapMode mode, std::vector<Key> mapping);
+    using KeyList = std::vector<Key>;
+    void map_key(Key key, KeymapMode mode, KeyList mapping);
     void unmap_key(Key key, KeymapMode mode);
 
     bool is_mapped(Key key, KeymapMode mode) const;
@@ -42,7 +43,6 @@ private:
 
     KeymapManager* m_parent;
 
-    using KeyList = std::vector<Key>;
     using KeyAndMode = std::pair<Key, KeymapMode>;
     using Keymap = UnorderedMap<KeyAndMode, KeyList>;
     Keymap m_mapping;