diff --git a/src/search.cpp b/src/search.cpp
index d28ac5f27..b88c428e2 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -872,7 +872,7 @@ Value Search::Worker::search(
         assert((ss - 1)->currentMove != Move::null());
 
         // Null move dynamic reduction based on depth
-        Depth R = 6 + depth / 3 + improving;
+        Depth R = 7 + depth / 3;
         do_null_move(pos, st, ss);
 
         Value nullValue = -search<NonPV>(pos, ss + 1, -beta, -beta + 1, depth - R, false);