diff --git a/src/conf/pcm/dmix.conf b/src/conf/pcm/dmix.conf
index 1bd3efef..4108ddb6 100644
--- a/src/conf/pcm/dmix.conf
+++ b/src/conf/pcm/dmix.conf
@@ -20,7 +20,7 @@ pcm.!dmix {
 	}
 	@args.SUBDEV {
 		type integer
-		default -1
+		default 0
 	}
 	@args.FORMAT {
 		type string
diff --git a/src/conf/pcm/dsnoop.conf b/src/conf/pcm/dsnoop.conf
index c461f0c9..49cfca98 100644
--- a/src/conf/pcm/dsnoop.conf
+++ b/src/conf/pcm/dsnoop.conf
@@ -20,7 +20,7 @@ pcm.!dsnoop {
 	}
 	@args.SUBDEV {
 		type integer
-		default -1
+		default 0
 	}
 	@args.FORMAT {
 		type string