diff --git a/sys/dev/acpica/acpi_pci.c b/sys/dev/acpica/acpi_pci.c
--- a/sys/dev/acpica/acpi_pci.c
+++ b/sys/dev/acpica/acpi_pci.c
@@ -391,6 +391,8 @@
 {
 	device_t child, dev;
 	ACPI_STATUS status;
+	int pmc;
+	uint16_t pmstat;
 	int error;
 
 	dev = context;
@@ -416,6 +418,12 @@
 			    device_get_nameunit(child), error);
 			return;
 		}
+		if (pci_find_cap(child, PCIY_PMG, &pmc) == 0) {
+			pmstat = pci_read_config(child, pmc + PCIR_POWER_STATUS, 2);
+			pmstat &= ~PCIM_PSTAT_PMEENABLE;
+			pmstat |= PCIM_PSTAT_PME;
+			pci_write_config(child, pmc + PCIR_POWER_STATUS, pmstat, 2);
+		}
 		status = acpi_SetInteger(h, "_EJ0", 1);
 		if (ACPI_FAILURE(status)) {
 			bus_topo_unlock();