diff --git a/public/scripts/variables.js b/public/scripts/variables.js
index f6b06e49b..e5fb36888 100644
--- a/public/scripts/variables.js
+++ b/public/scripts/variables.js
@@ -1,4 +1,4 @@
-import { chat_metadata, getCurrentChatId, saveSettingsDebounced, sendSystemMessage, system_message_types } from "../script.js";
+import { chat_metadata, getCurrentChatId, saveSettingsDebounced, sendSystemMessage, substituteParams, system_message_types } from "../script.js";
 import { extension_settings, saveMetadataDebounced } from "./extensions.js";
 import { executeSlashCommands, registerSlashCommand } from "./slash-commands.js";
 
@@ -208,7 +208,7 @@ function parseBooleanOperands(args) {
         }
 
         const stringLiteral = String(operand);
-        return stringLiteral || '';
+        return substituteParams(stringLiteral) || '';
     }
 
     const left = getOperand(args.a || args.left || args.first || args.x);