diff --git a/src/MinimaxSearch.cpp b/src/MinimaxSearch.cpp
index 8e066d1..0869ee2 100644
--- a/src/MinimaxSearch.cpp
+++ b/src/MinimaxSearch.cpp
@@ -54,7 +54,7 @@ double MinimaxSearch::alphaBeta(bup &board, double alpha, double beta, int depth
       bup result = board->result(move);
       v = std::min(v, alphaBeta(result, alpha, beta, depth + 1));
       if (v <= alpha) return v;
-      beta = std::max(beta, v);
+      beta = std::min(beta, v);
     }
   }