diff --git a/configure.ac b/configure.ac
index b458d11..b163128 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,6 +32,7 @@ AC_PROG_LEX
 AC_PROG_RANLIB
 AC_PROG_INSTALL
 AC_PATH_PROG(sedpath, sed)
+AM_PROG_AR
 
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT