diff --git a/src/search.cpp b/src/search.cpp
index ff6bf335d06..f5705bdfa7f 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -552,7 +552,7 @@ namespace {
     Key posKey;
     Move ttMove, move, excludedMove, bestMove;
     Depth extension, newDepth;
-    Value bestValue, value, ttValue, eval, maxValue, probCutBeta;
+    Value bestValue, value, ttValue, eval, maxValue, probCutBeta, initialAlpha;
     bool givesCheck, improving, didLMR, priorCapture;
     bool capture, doFullDepthSearch, moveCountPruning, ttCapture;
     Piece movedPiece;
@@ -567,6 +567,7 @@ namespace {
     moveCount          = captureCount = quietCount = ss->moveCount = 0;
     bestValue          = -VALUE_INFINITE;
     maxValue           = VALUE_INFINITE;
+    initialAlpha       = alpha;
 
     // Check for the available remaining time
     if (thisThread == Threads.main())
@@ -1296,7 +1297,12 @@ namespace {
                   update_pv(ss->pv, move, (ss+1)->pv);
 
               if (PvNode && value < beta) // Update alpha! Always alpha < beta
-                  alpha = value;
+              {
+                  if (beta < VALUE_INFINITE && initialAlpha > -VALUE_INFINITE)
+                      alpha = std::max(value, (beta - 1 + initialAlpha) / 2);
+                  else
+                      alpha = value;
+              }
               else
               {
                   assert(value >= beta); // Fail high