diff --git a/src/LNS.cpp b/src/LNS.cpp
index d4bad91..997c978 100644
--- a/src/LNS.cpp
+++ b/src/LNS.cpp
@@ -626,7 +626,7 @@ bool LNS::generateNeighborByRandomWalk()
         {
             if (i == idx)
             {
-                a = i;
+                a = n;
                 break;
             }
             i++;