diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c b/drivers/pci/pcie/aer/aerdrv_acpi.c
index 4d6991794fa2cbc1c09ff5a21098c0c111145cfd..01906576ab9113e1a85cb6c596967dbe6bdba7b0 100644
--- a/drivers/pci/pcie/aer/aerdrv_acpi.c
+++ b/drivers/pci/pcie/aer/aerdrv_acpi.c
@@ -23,10 +23,10 @@
 static inline int hest_match_pci(struct acpi_hest_aer_common *p,
 				 struct pci_dev *pci)
 {
-	return	(0           == pci_domain_nr(pci->bus) &&
-		 p->bus      == pci->bus->number &&
-		 p->device   == PCI_SLOT(pci->devfn) &&
-		 p->function == PCI_FUNC(pci->devfn));
+	return   ACPI_HEST_SEGMENT(p->bus) == pci_domain_nr(pci->bus) &&
+		 ACPI_HEST_BUS(p->bus)     == pci->bus->number &&
+		 p->device                 == PCI_SLOT(pci->devfn) &&
+		 p->function               == PCI_FUNC(pci->devfn);
 }
 
 static inline bool hest_match_type(struct acpi_hest_header *hest_hdr,
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 556c83ee6b42f3fafc419755f47062cde2212412..4ec8c194bfe55334fa5076401da04db5a0fa259b 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -457,7 +457,7 @@ struct acpi_hest_aer_common {
 	u8 enabled;
 	u32 records_to_preallocate;
 	u32 max_sections_per_record;
-	u32 bus;
+	u32 bus;		/* Bus and Segment numbers */
 	u16 device;
 	u16 function;
 	u16 device_control;
@@ -473,6 +473,14 @@ struct acpi_hest_aer_common {
 #define ACPI_HEST_FIRMWARE_FIRST        (1)
 #define ACPI_HEST_GLOBAL                (1<<1)
 
+/*
+ * Macros to access the bus/segment numbers in Bus field above:
+ *  Bus number is encoded in bits 7:0
+ *  Segment number is encoded in bits 23:8
+ */
+#define ACPI_HEST_BUS(bus)              ((bus) & 0xFF)
+#define ACPI_HEST_SEGMENT(bus)          (((bus) >> 8) & 0xFFFF)
+
 /* Hardware Error Notification */
 
 struct acpi_hest_notify {