diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 63cfef347f0d..05ffb6ef023a 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,7 @@
+Mon Nov 23 16:59:49 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	*  configure.in: Use AC_PREREQ(2.12.1).
+
 1998-11-16  Benjamin Kosnik  <bkoz@haight.constant.com>
 
         * cplus-dem.c (demangle_fund_type): Add demangling for C9x types.
diff --git a/libiberty/configure.in b/libiberty/configure.in
index 0b9b35b47850..a189b0794cb6 100644
--- a/libiberty/configure.in
+++ b/libiberty/configure.in
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script
 
-AC_PREREQ(2.5)
+AC_PREREQ(2.12.1)
 AC_INIT(pexecute.c)
 
 dnl We use these options to decide which functions to include.