diff -Naur ludia-1.5.2/configure ludia-1.5.2-work/configure
--- ludia-1.5.2/configure	2009-03-26 21:44:14.000000000 +0900
+++ ludia-1.5.2/configure	2009-05-28 00:29:15.000000000 +0900
@@ -20269,6 +20269,29 @@
    { (exit 1); exit 1; }; };
 fi
 
+pg_major_p=`$PG_CFG --version | sed 's/^\([^0-9]*\)\([0-9]\+\)\(\.\([0-9]\+\)\)\?\(\.\([0-9]\+\)\)\?\(.*\)$/\2/g'`
+if test -z "$pg_major_p" ; then
+    pg_major_p="0"
+fi
+{ echo "$as_me:$LINENO: PostgreSQL primary major version: $pg_major_p" >&5
+echo "$as_me: PostgreSQL primary major version: $pg_major_p" >&6;};
+
+pg_major_s=`$PG_CFG --version | sed 's/^\([^0-9]*\)\([0-9]\+\)\(\.\([0-9]\+\)\)\?\(\.\([0-9]\+\)\)\?\(.*\)$/\4/g'`
+if test -z "$pg_major_s" ; then
+    pg_major_s="0"
+fi
+{ echo "$as_me:$LINENO: PostgreSQL secondary major version: $pg_major_s" >&5
+echo "$as_me: PostgreSQL secondary major version: $pg_major_s" >&6;};
+
+pg_minor=`$PG_CFG --version | sed 's/^\([^0-9]*\)\([0-9]\+\)\(\.\([0-9]\+\)\)\?\(\.\([0-9]\+\)\)\?\(.*\)$/\6/g'`
+if test -z "$pg_minor" ; then
+    pg_minor="0"
+fi
+{ echo "$as_me:$LINENO: PostgreSQL minor version: $pg_minor" >&5
+echo "$as_me: PostgreSQL minor version: $pg_minor" >&6;};
+
+CPPFLAGS="-DPG_MAJOR_P=${pg_major_p} -DPG_MAJOR_S=${pg_major_s} -DPG_MINOR=${pg_minor} $CPPFLAGS"
+
 # Checks for libraries.
 
 echo "$as_me:$LINENO: checking for sen_index_create in -lsenna" >&5
diff -Naur ludia-1.5.2/configure.ac ludia-1.5.2-work/configure.ac
--- ludia-1.5.2/configure.ac	2009-03-26 21:43:47.000000000 +0900
+++ ludia-1.5.2/configure.ac	2009-05-28 00:36:32.000000000 +0900
@@ -122,6 +122,26 @@
     AC_MSG_ERROR([$PG_CFG] is not pg_config);
 fi
 
+pg_major_p=`$PG_CFG --version | sed 's/^\([[^0-9]]*\)\([[0-9]]\+\)\(\.\([[0-9]]\+\)\)\?\(\.\([[0-9]]\+\)\)\?\(.*\)$/\2/g'`
+if test -z "$pg_major_p" ; then
+    pg_major_p="0"
+fi
+AC_MSG_NOTICE([PostgreSQL secondary major version: $pg_major_p]);
+
+pg_major_s=`$PG_CFG --version | sed 's/^\([[^0-9]]*\)\([[0-9]]\+\)\(\.\([[0-9]]\+\)\)\?\(\.\([[0-9]]\+\)\)\?\(.*\)$/\4/g'`
+if test -z "$pg_major_s" ; then
+    pg_major_s="0"
+fi
+AC_MSG_NOTICE([PostgreSQL secondary major version: $pg_major_s]);
+
+pg_minor=`$PG_CFG --version | sed 's/^\([[^0-9]]*\)\([[0-9]]\+\)\(\.\([[0-9]]\+\)\)\?\(\.\([[0-9]]\+\)\)\?\(.*\)$/\6/g'`
+if test -z "$pg_minor" ; then
+    pg_minor="0"
+fi
+AC_MSG_NOTICE([PostgreSQL minor version: $pg_minor]);
+
+CPPFLAGS="-DPG_MAJOR_P=${pg_major_p} -DPG_MAJOR_S=${pg_major_s} -DPG_MINOR=${pg_minor} $CPPFLAGS"
+
 # Checks for libraries.
 AC_CHECK_LIB([senna], [sen_index_create])
 
diff -Naur ludia-1.5.2/pgsenna2.c ludia-1.5.2-work/pgsenna2.c
--- ludia-1.5.2/pgsenna2.c	2009-03-26 21:43:47.000000000 +0900
+++ ludia-1.5.2/pgsenna2.c	2009-05-28 00:29:15.000000000 +0900
@@ -610,6 +610,13 @@
   bs.index = index_info_open(index, 1, flags);
   bs.oid_type = oid_type;
   reltuples = IndexBuildHeapScan(heap, index, indexInfo,
+#if defined(PG_MAJOR_P) && (PG_MAJOR_P >= 8)
+#if (PG_MAJOR_P > 8) || (defined(PG_MAJOR_S) && (PG_MAJOR_S >= 3))
+#if (PG_MAJOR_P > 8) || (PG_MAJOR_S > 3) || (defined(PG_MINOR) && (PG_MINOR >= 6))
+                                 true,
+#endif
+#endif
+#endif
                                  buildCallback, (void *) &bs);
 #if defined(POSTGRES82) || defined(POSTGRES83)
   result = (IndexBuildResult *) PGS2_PALLOC(sizeof(IndexBuildResult));