--- dahdi-linux-2.2.1.ORIG/drivers/dahdi/Kbuild	2009-06-13 00:30:02.000000000 +0200
+++ dahdi-linux-2.2.1/drivers/dahdi/Kbuild	2009-08-07 03:15:19.000000000 +0200
@@ -32,12 +32,12 @@
 
 # Only enable this if you think you know what you're doing. This is not
 # supported yet:
-#obj-m += dahdi_echocan_oslec.o
+obj-m += dahdi_echocan_oslec.o
 #
 # A quick and dirty way to build OSLEC, if you happened to place it
 # yourself in the dahdi source tree. This is experimental. See README
 # regarding OSLEC.
-#obj-m += ../staging/echo/
+obj-m += ../staging/echo/echo.o
 
 CFLAGS_MODULE += -I$(DAHDI_INCLUDE) -I$(src)