diff --git a/src/conf/pcm/dmix.conf b/src/conf/pcm/dmix.conf
index 7063e5ce..ebdb6c2d 100644
--- a/src/conf/pcm/dmix.conf
+++ b/src/conf/pcm/dmix.conf
@@ -27,6 +27,7 @@ pcm.!dmix {
 	type dmix
 	ipc_key 5678293
 	ipc_gid audio
+	ipc_perm 0660
 	slave {
 		pcm {
 			type hw
diff --git a/src/conf/pcm/dsnoop.conf b/src/conf/pcm/dsnoop.conf
index 96eaca6c..1eba61e6 100644
--- a/src/conf/pcm/dsnoop.conf
+++ b/src/conf/pcm/dsnoop.conf
@@ -27,6 +27,7 @@ pcm.!dsnoop {
 	type dsnoop
 	ipc_key 5778293
 	ipc_gid audio
+	ipc_perm 0660
 	slave {
 		pcm {
 			type hw