diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
index a2d84ecf8f..e86d3eb263 100644
--- a/hw/i386/acpi-dsdt.dsl
+++ b/hw/i386/acpi-dsdt.dsl
@@ -62,8 +62,6 @@ DefinitionBlock (
 
     Scope(\_SB.PCI0) {
 
-        External(ISA, DeviceObj)
-
         Device(ISA) {
             Name(_ADR, 0x00010000)
 
diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
index 16eaca3fae..44fa4a9c0c 100644
--- a/hw/i386/q35-acpi-dsdt.dsl
+++ b/hw/i386/q35-acpi-dsdt.dsl
@@ -55,8 +55,6 @@ DefinitionBlock (
             Name(_ADR, 0x00)
             Name(_UID, 1)
 
-            External(ISA, DeviceObj)
-
             // _OSC: based on sample of ACPI3.0b spec
             Name(SUPP, 0) // PCI _OSC Support Field value
             Name(CTRL, 0) // PCI _OSC Control Field value