diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 6ab9517..47fc686 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -246,7 +246,7 @@
 #endif
 
 /* main.c */
-extern unsigned long x86_stack_size;
+extern unsigned long guest_stack_size;
 
 /* user access */