diff -uNr apachetop-0.12.6.orig/configure.ac apachetop-0.12.6/configure.ac
--- apachetop-0.12.6.orig/configure.ac	2013-07-09 14:06:14.000000000 -0400
+++ apachetop-0.12.6/configure.ac	2013-07-09 14:07:36.000000000 -0400
@@ -6,7 +6,7 @@
 AC_CONFIG_AUX_DIR(config)
 #AC_CONFIG_MACRO_DIR(m4) # 2.58
 
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADER(config.h)
 AM_INIT_AUTOMAKE(apachetop, 0.12.6) # 2.53 only?
 
 # Add non-standard directories to the include path