diff --git a/packages/blockly/core/renderers/zelos/constants.ts b/packages/blockly/core/renderers/zelos/constants.ts
index b0bf264f91e..83d1e82ccfa 100644
--- a/packages/blockly/core/renderers/zelos/constants.ts
+++ b/packages/blockly/core/renderers/zelos/constants.ts
@@ -729,7 +729,8 @@ export class ConstantProvider extends BaseConstantProvider {
         `pt ${this.FIELD_TEXT_FONTFAMILY};`,
       `}`,
 
-      `${selector} .blocklyTextInputBubble textarea {`,
+      // Comments.
+      `${selector} .blocklyCommentText {`,
       `font-weight: normal;`,
       `}`,