--- fvwm-2.6.5/configure.ac~	2013-05-06 18:24:49.677728463 +0200
+++ fvwm-2.6.5/configure.ac	2013-05-06 22:23:48.570323806 +0200
@@ -69,7 +69,7 @@
 AC_SUBST(MANPAGE_PREAMBLE)
 
 AM_INIT_AUTOMAKE(fvwm, ${version})
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADER(config.h)
 
 # check for programs needed to build html docs
 AC_CHECK_PROG(SED, sed, sed, "")