Index: files/dahdi-2.2.0.2-linux-2.6.33.patch
===================================================================
--- files/dahdi-2.2.0.2-linux-2.6.33.patch	(revision 0)
+++ files/dahdi-2.2.0.2-linux-2.6.33.patch	(revision 0)
@@ -0,0 +1,32 @@
+--- dahdi-linux-2.2.0.2/drivers/dahdi/wcb4xxp/base.c	2010/03/07 14:46:33	8266
++++ dahdi-linux-2.2.0.2/drivers/dahdi/wcb4xxp/base.c	2010/03/07 15:14:37	8267
+@@ -20,7 +20,6 @@
+  * this program for more details.
+  */
+ 
+-#include <linux/autoconf.h>
+ #include <linux/init.h>
+ 
+ #include <linux/kernel.h>	/* printk() */
+--- dahdi-linux-2.2.0.2/drivers/dahdi/wct4xxp/vpm450m.c	2010/03/07 14:46:33	8266
++++ dahdi-linux-2.2.0.2/drivers/dahdi/wct4xxp/vpm450m.c	2010/03/07 15:14:37	8267
+@@ -30,8 +30,6 @@
+ 
+ #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
+ #include <linux/config.h>
+-#else
+-#include <linux/autoconf.h>
+ #endif
+ 
+ /* API for Octasic access */
+--- dahdi-linux-2.2.0.2/include/dahdi/dahdi_config.h	2010/03/07 14:46:33	8266
++++ dahdi-linux-2.2.0.2/include/dahdi/dahdi_config.h	2010/03/07 15:14:37	8267
+@@ -23,8 +23,6 @@
+ #include <linux/version.h>
+ #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
+ #include <linux/config.h>
+-#else
+-#include <linux/autoconf.h>
+ #endif
+ #endif
+ 
Index: dahdi-2.2.0.2.ebuild
===================================================================
--- dahdi-2.2.0.2.ebuild	(revision 76)
+++ dahdi-2.2.0.2.ebuild	(working copy)
@@ -52,6 +52,9 @@
 	# error: dereferencing pointer to incomplete type
 	epatch "${FILESDIR}"/${P}-gcc44-hack.patch
 
+	# linux >2.6.18 auto-includes the autoconf files.
+	epatch "${FILESDIR}/${P}-linux-2.6.33.patch"
+
 	if use ecoslec; then
 		elog "Support for OSLEC echo canceller."
 		mkdir "${MY_P}/drivers/staging" || die "Error creating staging folder."