diff --git a/stand/efi/loader/main.c b/stand/efi/loader/main.c
--- a/stand/efi/loader/main.c
+++ b/stand/efi/loader/main.c
@@ -278,10 +278,11 @@
 #endif
 
 #ifdef MD_IMAGE_SIZE
+extern struct devsw md_dev;
+
 static bool
 probe_md_currdev(void)
 {
-	extern struct devsw md_dev;
 	bool rv;
 
 	set_currdev_devsw(&md_dev, 0);