1 files changed, 4 insertions, 3 deletions

diff --git a/gl/m4/exponentd.m4 b/gl/m4/exponentd.m4
index 2ef4643..db597af 100644
--- a/gl/m4/exponentd.m4
+++ b/gl/m4/exponentd.m4
@@ -1,9 +1,10 @@
-# exponentd.m4 serial 3
-dnl Copyright (C) 2007-2008, 2010-2023 Free Software Foundation, Inc.
+# exponentd.m4
+# serial 4
+dnl Copyright (C) 2007-2008, 2010-2024 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
-AC_DEFUN([gl_DOUBLE_EXPONENT_LOCATION],
+AC_DEFUN_ONCE([gl_DOUBLE_EXPONENT_LOCATION],
 [
   AC_CACHE_CHECK([where to find the exponent in a 'double'],
     [gl_cv_cc_double_expbit0],