diff --git a/src/search.cpp b/src/search.cpp
index 7f421b9c..7a16ef8c 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -64,7 +64,7 @@ namespace {
   // Razor and futility margins
   constexpr int RazorMargin = 661;
   Value futility_margin(Depth d, bool improving) {
-    return Value(198 * (d / ONE_PLY) - 178 * improving);
+    return Value(198 * (d / ONE_PLY - improving));
   }
 
   // Reductions lookup table, initialized at startup