diff --git a/src/viam/sdk/module/handler_map.hpp b/src/viam/sdk/module/handler_map.hpp
index 3c3dcaa39..4d448268f 100644
--- a/src/viam/sdk/module/handler_map.hpp
+++ b/src/viam/sdk/module/handler_map.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <unordered_map>
+
 #include <viam/sdk/resource/resource_api.hpp>
 
 namespace viam {