diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index 7795595..62a9caf 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -108,7 +108,7 @@
 			      get_order(page_size), flags);
 		if (r) {
 			printk(KERN_ERR "kvm_iommu_map_address:"
-			       "iommu failed to map pfn=%lx\n", pfn);
+			       "iommu failed to map pfn=%llx\n", pfn);
 			goto unmap_pages;
 		}