diff --git a/drivers/staging/comedi/Kconfig b/drivers/staging/comedi/Kconfig
index 37f33c4..1e296b7 100644
--- a/drivers/staging/comedi/Kconfig
+++ b/drivers/staging/comedi/Kconfig
@@ -1262,6 +1262,9 @@
 	tristate
 	select COMEDI_8255
 
+config COMEDI_ISADMA
+	tristate
+
 config COMEDI_NI_LABPC
 	tristate
 	select COMEDI_8255