diff --git a/configure.ac b/configure.ac
index 92655612..a2a80aa2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 
 AC_PREREQ(2.59)
 AC_INIT([xrdp], [0.6.0], [xrdp-devel@lists.sourceforge.net])
-AM_CONFIG_HEADER(config_ac.h:config_ac-h.in)
+AC_CONFIG_HEADERS(config_ac.h:config_ac-h.in)
 AM_INIT_AUTOMAKE([1.6 foreign])
 AC_PROG_CC
 AC_C_CONST