diff --git a/src/search.cpp b/src/search.cpp
index 09a9cc92..2dadd0dc 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1134,6 +1134,9 @@ moves_loop:  // When in check, search starts here
         if (PvNode)
             r--;
 
+        if (improving && ttValue <= alpha && move != ttMove)
+            r++;
+
         // Increase reduction if next ply has a lot of fail high (~5 Elo)
         if ((ss + 1)->cutoffCnt > 3)
             r++;