diff --git a/src/lang.zig b/src/lang.zig
index ef886b9..04195f5 100644
--- a/src/lang.zig
+++ b/src/lang.zig
@@ -13,6 +13,8 @@ pub const CommandType = enum {
     /// "LV2 Commands" are commands that receive split, index, and then receive
     /// any f64 arguments.
     lv2_command,
+
+    custom_command,
 };
 
 fn LV2Command(
@@ -33,19 +35,19 @@ fn LV2Command(
 }
 
 fn CustomCommand(
-    comptime tag: Command.tag,
-    comptime plugin: type,
-    comptime parameters: type,
+    comptime tag: Command.Tag,
+    comptime Plugin: type,
+    comptime PluginParameters: type,
 ) type {
     return struct {
         pub const base_tag = tag;
-        pub const command_type = CommandType.plugin_command;
-        pub const plugin_type = plugin;
+        pub const command_type = CommandType.custom_command;
+        pub const plugin_type = Plugin;
 
         base: Command,
         split: usize,
         index: usize,
-        parameters: LV2Parameters,
+        parameters: PluginParameters,
     };
 }