1 files changed, 2 insertions, 1 deletions

diff --git a/src/lisp.h b/src/lisp.h
index d0abb24b685..e606ffa0259 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1768,7 +1768,8 @@ CHAR_TABLE_EXTRA_SLOTS (struct Lisp_Char_Table *ct)
 
 /* Make sure that sub char-table contents slot is where we think it is.  */
 verify (offsetof (struct Lisp_Sub_Char_Table, contents)
-        == offsetof (struct Lisp_Vector, contents[SUB_CHAR_TABLE_OFFSET]));
+        == (offsetof (struct Lisp_Vector, contents)
+            + SUB_CHAR_TABLE_OFFSET * sizeof (Lisp_Object)));
 
 /***********************************************************************
                                Symbols