diff --git a/lib/api.js b/lib/api.js
index 6978e8d..58cf5a2 100644
--- a/lib/api.js
+++ b/lib/api.js
@@ -29,7 +29,7 @@ WaveSkin.default[2][2] = `\
 function renderSignal(source) {
     const rendered = WaveDrom_renderSignal(0, source, WaveSkin);
     delete rendered[1]['id'];
-    delete rendered[4][2][1]['style']; // workaround for https://github.com/wavedrom/wavedrom/issues/409
+    rendered[4][2].splice(1, 1); // workaround for https://github.com/wavedrom/wavedrom/issues/409
     return onml_stringify(rendered); // note: https://github.com/wavedrom/wavedrom/issues/412
 }