diff --git a/main.cpp b/main.cpp
index e2a3cd2..a0716ef 100644
--- a/main.cpp
+++ b/main.cpp
@@ -52,7 +52,13 @@
 #endif
 #endif
 
+#ifdef ENABLE_PCI_BRIDGE
+#if defined(ASPEED_P2A)
 PciDataHandler pciDataHandler(MAPPED_ADDRESS);
+#else
+#error "You must specify a hardware implementation."
+#endif
+#endif
 
 std::vector<HandlerPack> supportedFirmware = {
     {FirmwareBlobHandler::hashBlobID, &hashHandler},