diff --git a/src/libs/compat/freebsd_network/bus.cpp b/src/libs/compat/freebsd_network/bus.cpp
index 0c96448391..fd696b4b9c 100644
--- a/src/libs/compat/freebsd_network/bus.cpp
+++ b/src/libs/compat/freebsd_network/bus.cpp
@@ -137,6 +137,10 @@ bus_alloc_mem_resource(device_t dev, struct resource *res, int regid)
 
 	// TODO: check flags & PCI_address_prefetchable ?
 
+	// enable this I/O resource
+	if (pci_enable_io(dev, SYS_RES_MEMORY) != 0)
+		return -1;
+
 	void *virtualAddr;
 
 	res->r_mapped_area = map_mem(&virtualAddr, addr, size, 0,
@@ -153,6 +157,10 @@ bus_alloc_mem_resource(device_t dev, struct resource *res, int regid)
 static int
 bus_alloc_ioport_resource(device_t dev, struct resource *res, int regid)
 {
+	// enable this I/O resource
+	if (pci_enable_io(dev, SYS_RES_IOPORT) != 0)
+		return -1;
+
 	res->r_bustag = X86_BUS_SPACE_IO;
 	res->r_bushandle = pci_read_config(dev, regid, 4) & PCI_address_io_mask;
 	return 0;