diff --git a/src/include/config.h b/src/include/config.h
index 2f1cd1b72e310b3136eb1f3d5324a24e95b0ed9e..bceb3683bb8c0f2a1dba39bd09a98602a842d545 100644
--- a/src/include/config.h
+++ b/src/include/config.h
@@ -4,6 +4,9 @@
    eventual use of autoconf to build the server 
 */
 
+#define BLCKSZ	8192
+
+
 #if defined(win32)
 #  define WIN32
 #  define NO_UNISTD_H
@@ -30,7 +33,6 @@
 #  define NO_VFORK
 #endif
 
-
 /*  Debug and various "defines" that should be documented */
 
 /* found in function aclparse() in src/backend/utils/adt/acl.c */