diff --git a/src/search.cpp b/src/search.cpp
index f20e4f023e2..c27d93d2565 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1056,7 +1056,7 @@ Value Search::Worker::search(
             // and lower extension margins scale well.
 
             if (!rootNode && move == ttData.move && !excludedMove
-                && depth >= 4 - (thisThread->completedDepth > 33) + ss->ttPv
+                && depth >= 5 - (thisThread->completedDepth > 33) + ss->ttPv
                 && is_valid(ttData.value) && !is_decisive(ttData.value)
                 && (ttData.bound & BOUND_LOWER) && ttData.depth >= depth - 3)
             {