diff --git a/src/search.cpp b/src/search.cpp
index 77acd89e..3cae0e3f 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -507,7 +507,7 @@ namespace {
     Rml.init(pos, rootMoves);
 
     // Handle special case of searching on a mate/stalemate position
-    if (!Rml.size())
+    if (Rml.empty())
     {
         cout << "info" << depth_to_uci(DEPTH_ZERO)
              << score_to_uci(pos.in_check() ? -VALUE_MATE : VALUE_DRAW, alpha, beta) << endl;