diff --git a/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c b/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c
index 6b2b6797b3..69903a6009 100644
--- a/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c
+++ b/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c
@@ -589,7 +589,7 @@ GetResourcePadding (
     return EFI_INVALID_PARAMETER;
   }
 
-  DefaultIo       = TRUE;
+  DefaultIo       = FALSE;
   DefaultMmio     = TRUE;
   DefaultPrefMmio = TRUE;