1 files changed, 3 insertions, 0 deletions
diff --git a/Museum.h b/Museum.h
index bc5b590..445a8bf 100644
--- a/Museum.h
+++ b/Museum.h
@@ -3,6 +3,7 @@
 #include <thread>
 #include <chrono>
 #include <stack>
+#include <mutex>
 
 #include "People.h"
 #include "Canvas.h"
@@ -30,6 +31,8 @@ public:
 
 private:
 	int jump = 0;
+	std::mutex jump_mutex;
+	void process_jump();
 
 private:
 	bool working = true;