diff --git a/unix/mkerrors.sh b/unix/mkerrors.sh
index 7456d9ddd..3db57bc82 100755
--- a/unix/mkerrors.sh
+++ b/unix/mkerrors.sh
@@ -337,6 +337,8 @@ struct ltchars {
 includes_NetBSD='
 #include <sys/types.h>
 #include <sys/param.h>
+#include <sys/disk.h>
+#include <sys/disklabel.h>
 #include <sys/event.h>
 #include <sys/extattr.h>
 #include <sys/mman.h>