diff --git a/cpp-game-vs/game.cpp b/cpp-game-vs/game.cpp
index bea5e8e..27eb0b7 100644
--- a/cpp-game-vs/game.cpp
+++ b/cpp-game-vs/game.cpp
@@ -52,7 +52,7 @@ Rule::Choice Rule::GameLogic::operator()(const Rule::Choice lhs, const Rule::Cho
     if (lhs == rhs) throw std::domain_error("Do not handle same choice of symbol");
 
     std::map<std::tuple<Rule::Choice, Rule::Choice>, Rule::Choice> rule;
-    rule[std::make_tuple(Rule::Choice::ROCK, Rule::Choice::PAPER)] = Rule::Choice::PAPER;
+    rule[std::make_tuple(Rule::Choice::ROCK, Rule::Choice::PAPER)] = Rule::Choice::ROCK;
     rule[std::make_tuple(Rule::Choice::PAPER, Rule::Choice::ROCK)] = Rule::Choice::PAPER;
     rule[std::make_tuple(Rule::Choice::ROCK, Rule::Choice::SCISSORS)] = Rule::Choice::ROCK;
     rule[std::make_tuple(Rule::Choice::SCISSORS, Rule::Choice::ROCK)] = Rule::Choice::ROCK;