diff --git a/src/define.zig b/src/define.zig
index f3e72a0..8dbcbc6 100644
--- a/src/define.zig
+++ b/src/define.zig
@@ -33,7 +33,7 @@ pub fn define(
     defer state.deinit(gpa);
 
     inline for (to_define) |T| {
-        _ = try addClass(&state, T);
+        _ = try addClass(&state, gpa, T);
     }
 
     var file = try std.fs.createFileAbsolute(absolute_output_path, .{});