diff --git a/include/Cubed/gameplay/cave_carver.hpp b/include/Cubed/gameplay/cave_carver.hpp
index 0f61bd2..e737f3f 100644
--- a/include/Cubed/gameplay/cave_carver.hpp
+++ b/include/Cubed/gameplay/cave_carver.hpp
@@ -1,7 +1,9 @@
 #pragma once
 #include "Cubed/gameplay/cave_path.hpp"
 
+#include <shared_mutex>
 #include <tbb/concurrent_hash_map.h>
+
 namespace Cubed {
 class CaveCarver {
     using CaveHashMap = tbb::concurrent_hash_map<unsigned, CavePath>;
diff --git a/include/Cubed/gameplay/river_worm.hpp b/include/Cubed/gameplay/river_worm.hpp
index ae6b994..cdcdec8 100644
--- a/include/Cubed/gameplay/river_worm.hpp
+++ b/include/Cubed/gameplay/river_worm.hpp
@@ -4,7 +4,9 @@
 #include "Cubed/tools/cubed_random.hpp"
 
 #include <glm/glm.hpp>
+#include <shared_mutex>
 #include <tbb/concurrent_hash_map.h>
+
 namespace Cubed {
 
 class RiverWorm {