diff --git a/configure.ac b/configure.ac
index b0faff4c..b637a169 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,7 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 AM_PROG_AS
 AC_PROG_INSTALL
-AM_PROG_AR
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 AC_PROG_LIBTOOL
 AC_PROG_LN_S