diff --git a/configure.ac b/configure.ac
index aec9978..ef71f71 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,6 +16,7 @@ CFLAGS="$CFLAGS -W -Wall"
 CXXFLAGS="$CXXFLAGS -W -Wall"
 
 AC_PROG_INSTALL
+AM_PROG_AR
 AC_PROG_RANLIB
 AC_PATH_PROG(STRIP, strip)
 AC_PATH_PROG(RM, rm)