diff --git a/configure.ac b/configure.ac
index eb2744b61..9d7572a29 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ dnl   Process this file with autoconf to produce configure.
 dnl
 
 define(GUILE_CONFIGURE_COPYRIGHT,[[
-Copyright 1998-2023 Free Software Foundation, Inc.
+Copyright 1998-2023, 2025 Free Software Foundation, Inc.
 
 This file is part of Guile.
 
@@ -28,7 +28,7 @@ AC_INIT([GNU Guile],
         m4_esyscmd([build-aux/git-version-gen --match v3.0.\* .tarball-version]),
         [bug-guile@gnu.org])
 AC_CONFIG_AUX_DIR([build-aux])
-AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_MACRO_DIRS([m4 libguile/whippet])
 AC_CONFIG_SRCDIR(GUILE-VERSION)
 
 AC_CANONICAL_TARGET
@@ -1120,6 +1120,10 @@ main (int argc, char **argv)
 	       [],
 	       [AC_MSG_WARN(Guessing that stack grows down -- see scmconfig.h)])
 
+# Whippet GC library
+WHIPPET_PKG_COLLECTOR(bdw)
+WHIPPET_PKG
+
 #--------------------------------------------------------------------
 #
 # Boehm's GC library