diff --git a/src/cmdSwitches.js b/src/cmdSwitches.js
index d7a4394..4091a8e 100644
--- a/src/cmdSwitches.js
+++ b/src/cmdSwitches.js
@@ -9,7 +9,7 @@ const presets = {
 
 module.exports = () => {
   let c = {};
-  for (const x of ('base,' + (oaConfig.cmdPreset || 'perf')).split(',').reduce((a, x) => a.concat(presets[x]?.split(' '))).concat((oaConfig.customFlags ?? '').split(' '))) {
+  for (const x of ('base,' + (oaConfig.cmdPreset || 'perf')).split(',').reduce((a, x) => a.concat(presets[x]?.split(' ')), (oaConfig.customFlags ?? '').split(' '))) {
     if (!x) continue;
     const [ k, v ] = x.split('=');
 
@@ -19,4 +19,4 @@ module.exports = () => {
   for (const k in c) {
     app.commandLine.appendSwitch(k.replace('--', ''), c[k].join(','));
   }
-};
\ No newline at end of file
+};