diff --git a/config/libtool.m4 b/config/libtool.m4
index 2373e5720d..f6e426dbdf 100644
--- a/config/libtool.m4
+++ b/config/libtool.m4
@@ -28,8 +28,8 @@
 
 # ... bunch of stuff removed here ...
 
-# AC_PROG_LD - find the path to the GNU or non-GNU linker
-AC_DEFUN([AC_PROG_LD],
+# PGAC_PROG_LD - find the path to the GNU or non-GNU linker
+AC_DEFUN([PGAC_PROG_LD],
 [AC_ARG_WITH(gnu-ld,
 [  --with-gnu-ld           assume the C compiler uses GNU ld [[default=no]]],
 test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
@@ -102,10 +102,10 @@ else
   AC_MSG_RESULT(no)
 fi
 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
-AC_PROG_LD_GNU
+PGAC_PROG_LD_GNU
 ])
 
-AC_DEFUN([AC_PROG_LD_GNU],
+AC_DEFUN([PGAC_PROG_LD_GNU],
 [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
 [# I'd rather use --version here, but apparently some GNU ld's only accept -v.
 if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
diff --git a/configure.in b/configure.in
index b0588b411e..cf9236b652 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.367 2004/07/14 17:55:09 petere Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.368 2004/07/17 18:53:56 petere Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -525,7 +525,7 @@ AC_MSG_NOTICE([using LDFLAGS=$LDFLAGS])
 AC_PROG_AWK
 PGAC_PATH_FLEX
 AC_PROG_LN_S
-AC_PROG_LD
+PGAC_PROG_LD
 AC_SUBST(LD)
 AC_SUBST(with_gnu_ld)
 case $host_os in sysv5*)