1 files changed, 5 insertions, 1 deletions
diff --git a/src/uci.cpp b/src/uci.cpp
index 4357e99..f099b78 100644
--- a/src/uci.cpp
+++ b/src/uci.cpp
@@ -11,6 +11,7 @@
 #include <cctype>
 #include <cstdint>
 #include <cstdio>
+#include <cstdlib>
 #include <iostream>
 #include <sstream>
 #include <string>
@@ -129,7 +130,10 @@ void Uci() {
           break;
         }
       }
-
+      if (depth != -1 && depth <= 0) {
+        cout << "Fatal: Depth must be positive integer";
+        exit(1);
+      }
       Move best = GetBestMove(&game, depth);
 
       cout << "bestmove ";