diff --git a/src/hwr2/resource_management.hpp b/src/hwr2/resource_management.hpp
index 328bcd159..8c9adffc0 100644
--- a/src/hwr2/resource_management.hpp
+++ b/src/hwr2/resource_management.hpp
@@ -12,6 +12,8 @@
 
 #include "../rhi/rhi.hpp"
 
+#include <unordered_map>
+
 namespace srb2::hwr2
 {