diff --git a/src/tt.cpp b/src/tt.cpp
index 8c5f3e34..4cc19c59 100644
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -58,7 +58,7 @@ TranspositionTable::~TranspositionTable() {
 
 void TranspositionTable::set_size(unsigned mbSize) {
 
-  assert(mbSize >= 4 && mbSize <= 1024);
+  assert(mbSize >= 4 && mbSize <= 4096);
 
   unsigned newSize = 1024;