diff --git a/src/cards/SI_7018.conf b/src/cards/SI_7018.conf
index 68b9bb4c..4782753f 100644
--- a/src/cards/SI_7018.conf
+++ b/src/cards/SI_7018.conf
@@ -58,7 +58,6 @@ pcm.si7018_rear {
 				name "PCM Playback Volume"
 				preserve true
 				lock true
-				index { @func private_pcm_subdevice }
 				value [ 24 24 ]
 			}
 		]