diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 8c1375985557..e60f4cd29eb2 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -1144,7 +1144,8 @@ int __init amd_iommu_init(void)
 	return ret;
 
 free:
-	free_pages((unsigned long)amd_iommu_pd_alloc_bitmap, 1);
+	free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
+		   get_order(MAX_DOMAIN_ID/8));
 
 	free_pages((unsigned long)amd_iommu_pd_table,
 		   get_order(rlookup_table_size));