diff --git a/arch/powerpc/boot/of.c b/arch/powerpc/boot/of.c
index 2cec5c1..8fb42b6 100644
--- a/arch/powerpc/boot/of.c
+++ b/arch/powerpc/boot/of.c
@@ -282,6 +282,8 @@
 
 	prom = (int (*)(void *))promptr;
 	loader_info.promptr = promptr;
-	loader_info.initrd_addr = a1;
-	loader_info.initrd_size = a2;
+	if (a1 && a2 && a2 != 0xdeadbeef) {
+		loader_info.initrd_addr = a1;
+		loader_info.initrd_size = a2;
+	}
 }