diff -Naur wmpower-0.4.3.orig/configure.in wmpower-0.4.3/configure.in
--- wmpower-0.4.3.orig/configure.in	2008-11-25 11:05:58.000000000 +0100
+++ wmpower-0.4.3/configure.in	2021-01-03 00:30:15.977692665 +0100
@@ -3,6 +3,7 @@
 AC_CONFIG_SRCDIR(src/wmpower.c)
 AM_INIT_AUTOMAKE([1.7 check-news dist-bzip2])
 
+AM_PROG_AR
 AC_GNU_SOURCE
 AC_PROG_INSTALL
 AC_PROG_CC