diff --git a/ChangeLog b/ChangeLog
index 4f1c7b6..4d2881d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2000-08-26  Bruno Haible  <haible@clisp.cons.org>
+
+        * autoconf/acgeneral.m4 (AC_OUTPUT): Use braces in exec_prefix default
+          value, not parens.
+
 2000-08-18  Bruno Haible  <haible@clisp.cons.org>
 
         * include/cl_univpoly_modint.h: Fix typo.
diff --git a/autoconf/acgeneral.m4 b/autoconf/acgeneral.m4
index 71d72a9..78fb594 100644
--- a/autoconf/acgeneral.m4
+++ b/autoconf/acgeneral.m4
@@ -2095,7 +2095,7 @@ trap 'rm -fr conftest* confdefs* core $ac_clean_files; exit 1' 1 2 15
 
 test "x$prefix" = xNONE && prefix=$ac_default_prefix
 # Let make expand exec_prefix.
-test "x$exec_prefix" = xNONE && exec_prefix='$(prefix)'
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
 
 # Any assignment to VPATH causes Sun make to only execute
 # the first set of double-colon rules, so remove it if not needed.