diff --git a/ArmVirtPkg/Library/PlatformIntelBdsLib/IntelBdsPlatform.c b/ArmVirtPkg/Library/PlatformIntelBdsLib/IntelBdsPlatform.c
index 9267a188e8..02d698b455 100644
--- a/ArmVirtPkg/Library/PlatformIntelBdsLib/IntelBdsPlatform.c
+++ b/ArmVirtPkg/Library/PlatformIntelBdsLib/IntelBdsPlatform.c
@@ -25,6 +25,7 @@
 #include <Protocol/PciIo.h>
 #include <Protocol/PciRootBridgeIo.h>
 #include <Guid/EventGroup.h>
+#include <Guid/RootBridgesConnectedEventGroup.h>
 
 #include "IntelBdsPlatform.h"
 
@@ -369,6 +370,11 @@ PlatformBdsPolicyBehavior (
   //
   FilterAndProcess (&gEfiPciRootBridgeIoProtocolGuid, NULL, Connect);
 
+  //
+  // Signal the ACPI platform driver that it can download QEMU ACPI tables.
+  //
+  EfiEventGroupSignal (&gRootBridgesConnectedEventGroupGuid);
+
   //
   // Find all display class PCI devices (using the handles from the previous
   // step), and connect them non-recursively. This should produce a number of
diff --git a/ArmVirtPkg/Library/PlatformIntelBdsLib/PlatformIntelBdsLib.inf b/ArmVirtPkg/Library/PlatformIntelBdsLib/PlatformIntelBdsLib.inf
index 79ba7b2afb..f104accc03 100644
--- a/ArmVirtPkg/Library/PlatformIntelBdsLib/PlatformIntelBdsLib.inf
+++ b/ArmVirtPkg/Library/PlatformIntelBdsLib/PlatformIntelBdsLib.inf
@@ -71,6 +71,7 @@
   gEfiFileSystemInfoGuid
   gEfiFileSystemVolumeLabelInfoIdGuid
   gEfiEndOfDxeEventGroupGuid
+  gRootBridgesConnectedEventGroupGuid
 
 [Protocols]
   gEfiDevicePathProtocolGuid