diff --git a/arch/x86/include/asm/msi.h b/arch/x86/include/asm/msi.h
index 770295887e568f23e8d161256b12cd7e8fcddde7..935c6d4703418f86cd7b6e2734504d1c0419ef7c 100644
--- a/arch/x86/include/asm/msi.h
+++ b/arch/x86/include/asm/msi.h
@@ -63,7 +63,7 @@ struct msi_msg;
 u32 x86_msi_msg_get_destid(struct msi_msg *msg, bool extid);
 
 #define X86_VECTOR_MSI_FLAGS_SUPPORTED					\
-	(MSI_GENERIC_FLAGS_MASK | MSI_FLAG_PCI_MSIX)
+	(MSI_GENERIC_FLAGS_MASK | MSI_FLAG_PCI_MSIX | MSI_FLAG_PCI_MSIX_ALLOC_DYN)
 
 #define X86_VECTOR_MSI_FLAGS_REQUIRED					\
 	(MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS)