diff --git a/src/state.hpp b/src/state.hpp
index 7850659..00aba81 100644
--- a/src/state.hpp
+++ b/src/state.hpp
@@ -8,6 +8,7 @@
 #ifndef STATE_HPP
 #define STATE_HPP
 
+#include <mutex>
 #include <queue>
 
 #include "base.hpp"
@@ -20,6 +21,9 @@ namespace cw::state
     cw::node::NodeAllocator allocator;
     std::queue<u64> queue;
 
+    std::mutex mutex_queue;
+    std::mutex mutex_allocator;
+
     State(void);
   };