diff --git a/usr.sbin/acpi/acpidump/acpi.c b/usr.sbin/acpi/acpidump/acpi.c
index 6b1b2a9155d5..6241dfdd3f69 100644
--- a/usr.sbin/acpi/acpidump/acpi.c
+++ b/usr.sbin/acpi/acpidump/acpi.c
@@ -376,6 +376,28 @@ acpi_handle_ecdt(struct ACPIsdt *sdp)
 	printf(END_COMMENT);
 }
 
+static void
+acpi_handle_mcfg(struct ACPIsdt *sdp)
+{
+	struct MCFGbody *mcfg;
+	u_int i, e;
+
+	printf(BEGIN_COMMENT);
+	acpi_print_sdt(sdp);
+	mcfg = (struct MCFGbody *) sdp->body;
+
+	e = (sdp->len - ((caddr_t)&mcfg->s[0] - (caddr_t)sdp)) /
+	    sizeof(*mcfg->s);
+	for (i = 0; i < e; i++, mcfg++) {
+		printf("\n");
+		printf("\tBase Address= 0x%016jx\n", mcfg->s[i].baseaddr);
+		printf("\tSegment Group= 0x%04x\n", mcfg->s[i].seg_grp);
+		printf("\tStart Bus= %d\n", mcfg->s[i].start);
+		printf("\tEnd Bus= %d\n", mcfg->s[i].end);
+	}
+	printf(END_COMMENT);
+}
+
 static void
 acpi_print_sdt(struct ACPIsdt *sdp)
 {
@@ -683,6 +705,8 @@ acpi_handle_rsdt(struct ACPIsdt *rsdp)
 			acpi_handle_hpet(sdp);
 		else if (!memcmp(sdp->signature, "ECDT", 4))
 			acpi_handle_ecdt(sdp);
+		else if (!memcmp(sdp->signature, "MCFG", 4))
+			acpi_handle_mcfg(sdp);
 		else {
 			printf(BEGIN_COMMENT);
 			acpi_print_sdt(sdp);
diff --git a/usr.sbin/acpi/acpidump/acpidump.h b/usr.sbin/acpi/acpidump/acpidump.h
index ca56398af2a9..0b7712aea276 100644
--- a/usr.sbin/acpi/acpidump/acpidump.h
+++ b/usr.sbin/acpi/acpidump/acpidump.h
@@ -293,6 +293,18 @@ struct ECDTbody {
 	u_char		ec_id[1];	/* Variable length name string */
 } __packed;
 
+/* Memory Mapped PCI config space base allocation structure */
+struct MCFGbody {
+	uint8_t		rsvd[8];
+	struct {
+		uint64_t	baseaddr;	/* Base Address */
+		uint16_t	seg_grp;	/* Segment group number */
+		uint8_t		start;		/* Starting bus number */
+		uint8_t		end;		/* Ending bus number */
+		uint8_t		rsvd[4];	/* Reserved */
+	} s[];
+} __packed;
+
 /*
  * Addresses to scan on ia32 for the RSD PTR.  According to section 5.2.2
  * of the ACPI spec, we only consider two regions for the base address: