diff --git a/mopcopy/mopcopy.c b/mopcopy/mopcopy.c
index a3ede3e..4007457 100644
--- a/mopcopy/mopcopy.c
+++ b/mopcopy/mopcopy.c
@@ -73,7 +73,7 @@ __RCSID("$NetBSD: mopcopy.c,v 1.7 2019/12/27 09:41:52 msaitoh Exp $");
 #define MID_VAX 150
 #endif
 #if !defined(MID_VAX1K)
-#define MID_VAX 140
+#define MID_VAX1K 140
 #endif
 
 #ifndef NOELF