diff --git a/include/pciDeviceClass.hpp b/include/pciDeviceClass.hpp
index 6a6895c..3c08f65 100644
--- a/include/pciDeviceClass.hpp
+++ b/include/pciDeviceClass.hpp
@@ -17,6 +17,8 @@
 #pragma once
 #include <boost/container/flat_map.hpp>
 
+#include <string>
+
 static constexpr char const* coprocessorSubClass = "Coprocessor";
 static constexpr char const* otherClass = "Other";