diff -Naur wmpasman-2.2.orig/configure.ac wmpasman-2.2/configure.ac
--- wmpasman-2.2.orig/configure.ac	2018-12-16 17:39:47.000000000 +0100
+++ wmpasman-2.2/configure.ac	2021-01-03 00:17:27.934691093 +0100
@@ -9,6 +9,7 @@
 AC_SUBST(VERSION)
 
 # Checks for programs.
+AM_PROG_AR
 AC_PROG_AWK
 AC_PROG_CC
 AC_PROG_CC_STDC