1 files changed, 1 insertions, 1 deletions
diff --git a/mg.h b/mg.h
index 844cdbbc47..76903ca4a9 100644
--- a/mg.h
+++ b/mg.h
@@ -25,7 +25,7 @@ struct mgvtbl {
 
 struct magic {
     MAGIC*	mg_moremagic;
-    MGVTBL*	mg_virtual;	/* pointer to magic functions */
+    const MGVTBL* mg_virtual;	/* pointer to magic functions */
     U16		mg_private;
     char	mg_type;
     U8		mg_flags;