diff --git a/pci_handler.hpp b/pci_handler.hpp
index ba09d51..755ee18 100644
--- a/pci_handler.hpp
+++ b/pci_handler.hpp
@@ -23,6 +23,7 @@
     PciDataHandler() = default;
 
     bool open() override;
+    bool close() override;
     std::vector<std::uint8_t> copyFrom(std::uint32_t length) override;
     bool write(const std::vector<std::uint8_t>& configuration) override;
     std::vector<std::uint8_t> read() override;