diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y
index a3d3c7041..70228e1e2 100644
--- a/src/libexpr/parser.y
+++ b/src/libexpr/parser.y
@@ -520,7 +520,7 @@ path_start
     /* add back in the trailing '/' to the first segment */
     if ($1.p[$1.l-1] == '/' && $1.l > 1)
       path += "/";
-    $$ = new ExprPath(path);
+    $$ = new ExprPath(std::move(path));
   }
   | HPATH {
     if (evalSettings.pureEval) {
@@ -530,7 +530,7 @@ path_start
         );
     }
     Path path(getHome() + std::string($1.p + 1, $1.l - 1));
-    $$ = new ExprPath(path);
+    $$ = new ExprPath(std::move(path));
   }
   ;