diff --git a/src/search.cpp b/src/search.cpp
index 2a7cde2b..9ae28d3c 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -663,7 +663,7 @@ namespace {
     // Step 8. Null move search with verification search (is omitted in PV nodes)
     if (   !PvNode
         && !ss->skipNullMove
-        &&  depth > ONE_PLY
+        &&  depth >= 2 * ONE_PLY
         &&  eval >= beta
         &&  abs(beta) < VALUE_MATE_IN_MAX_PLY
         &&  pos.non_pawn_material(pos.side_to_move()))