diff --git a/lix/libutil/error.hh b/lix/libutil/error.hh
index 5306327b0..ea8e87f64 100644
--- a/lix/libutil/error.hh
+++ b/lix/libutil/error.hh
@@ -193,11 +193,16 @@ public:
         err.pos = pos;
     }
 
-    void pushTrace(Trace trace)
+    void pushTrace(Trace const & trace)
     {
         err.traces.push_front(trace);
     }
 
+    void pushTrace(Trace && trace)
+    {
+        err.traces.emplace_front(trace);
+    }
+
     template<typename... Args>
     void addTrace(std::shared_ptr<Pos> && e, std::string_view fs, const Args & ... args)
     {