diff --git a/kernel/entry.S b/kernel/entry.S
index b72ddbc..90fdbac 100644
--- a/kernel/entry.S
+++ b/kernel/entry.S
@@ -3,6 +3,7 @@
         # kernel.ld causes the following code to
         # be placed at 0x80000000.
 .section .text
+.global _entry
 _entry:
 	# set up a stack for C.
         # stack0 is declared in start.c,