diff --git a/init/main.c b/init/main.c
index edeace0..756eca4 100644
--- a/init/main.c
+++ b/init/main.c
@@ -630,9 +630,10 @@
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	if (initrd_start && !initrd_below_start_ok &&
-			initrd_start < min_low_pfn << PAGE_SHIFT) {
+	    page_to_pfn(virt_to_page(initrd_start)) < min_low_pfn) {
 		printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
-		    "disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
+		    "disabling it.\n",
+		    page_to_pfn(virt_to_page(initrd_start)), min_low_pfn);
 		initrd_start = 0;
 	}
 #endif