diff --git a/configure.ac b/configure.ac
index a907f02..3e6d093 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,7 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AC_PROG_CC(gcc)
 dnl Checks for programs.
 AC_PROG_MAKE_SET
-AM_PROG_AR
+m4_pattern_allow([AM_PROG_AR], [AM_PROG_AR])
 LT_INIT
 AC_PROG_LEX
 AC_PROG_YACC