diff --git a/lib/modem-commands.js b/lib/modem-commands.js
index 832f6dd..f817b13 100644
--- a/lib/modem-commands.js
+++ b/lib/modem-commands.js
@@ -40,7 +40,7 @@ exports.writeToPortAndWaitForReadline = function writeToPortAndWaitForReadline(c
 exports.writeToPortAndWaitForOkOrError = function writeToPortAndWaitForOkOrError(cmd, lockName) {
     const parserName = 'customParserWaitForOkOrError';
     return new Promise(async (resolve) => {
-        const parser = new ParserRegex({ regex: parsers.PARSER_WAIT_FOR_OK_OR_ERROR_REGEX });
+        const parser = new ParserRegex({ regex: /(?:OK|ERROR)\r\n/ });
         parser.on('data', (data) => {
             logger.verbose('INCOMING', { parser: parserName, data: data.toString() });
             logger.verbose(`Unpiping ${parserName}`);