diff --git a/src/search.cpp b/src/search.cpp
index 38399650..7f933a46 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -335,12 +335,12 @@ void MainThread::search() {
 
 void Thread::search() {
 
-  Stack stack[MAX_PLY+7], *ss = stack+5; // To allow referencing (ss-5) and (ss+2)
+  Stack stack[MAX_PLY+7], *ss = stack+4; // To allow referencing (ss-4) and (ss+2)
   Value bestValue, alpha, beta, delta;
   Move easyMove = MOVE_NONE;
   MainThread* mainThread = (this == Threads.main() ? Threads.main() : nullptr);
 
-  std::memset(ss-5, 0, 8 * sizeof(Stack));
+  std::memset(ss-4, 0, 7 * sizeof(Stack));
 
   bestValue = delta = alpha = -VALUE_INFINITE;
   beta = VALUE_INFINITE;