diff --git a/src/ucioption.cpp b/src/ucioption.cpp
index ed46d71e6f4..427c85ef45e 100644
--- a/src/ucioption.cpp
+++ b/src/ucioption.cpp
@@ -60,7 +60,7 @@ void init(OptionsMap& o) {
   o["Contempt Factor"]          << Option(0, -50,  50);
   o["Min Split Depth"]          << Option(0, 0, 12, on_threads);
   o["Threads"]                  << Option(1, 1, MAX_THREADS, on_threads);
-  o["Hash"]                     << Option(32, 1, 16384, on_hash_size);
+  o["Hash"]                     << Option(32, 1, 65536, on_hash_size);
   o["Clear Hash"]               << Option(on_clear_hash);
   o["Ponder"]                   << Option(true);
   o["MultiPV"]                  << Option(1, 1, 500);