diff --git a/src/include/access/gist.h b/src/include/access/gist.h
index 0a8ae84990..cfa07f2be5 100644
--- a/src/include/access/gist.h
+++ b/src/include/access/gist.h
@@ -9,7 +9,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/access/gist.h,v 1.52 2006/03/05 15:58:53 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/access/gist.h,v 1.53 2006/06/25 01:02:12 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -142,7 +142,7 @@ typedef struct
 	GISTENTRY	vector[1];
 } GistEntryVector;
 
-#define GEVHDRSZ	(offsetof(GistEntryVector, vector[0]))
+#define GEVHDRSZ	(offsetof(GistEntryVector, vector))
 
 /*
  * macro to initialize a GISTENTRY