diff --git a/etc/devd.conf b/etc/devd.conf
index ed377522b1d7..601e5886bbee 100644
--- a/etc/devd.conf
+++ b/etc/devd.conf
@@ -265,7 +265,7 @@ notify 0 {
 
 notify 0 {
 	match "system"		"ACPI";
-	match "subsystem"i	"ASUS";
+	match "subsystem"	"ASUS";
 	match "notify"		"0x31";
 	action			"mixer vol -10";
 };