diff --git a/fusion-cli/build/get-webpack-config.js b/fusion-cli/build/get-webpack-config.js
index 803b6bb80d..4c8e31bb89 100644
--- a/fusion-cli/build/get-webpack-config.js
+++ b/fusion-cli/build/get-webpack-config.js
@@ -132,9 +132,12 @@ function getWebpackConfig(opts /*: WebpackConfigOpts */) {
     legacyPkgConfig = {},
     worker,
   } = opts;
-  const main = 'src/main.js';
+  const main = fusionConfig.main || 'src/main.js';
 
   if (!fs.existsSync(path.join(dir, main))) {
+    if(fusionConfig.main) {
+      throw new Error(`File configured as main entry point in .fusionrc.js '${fusionConfig.main}' could not be found in ${dir}`)
+    }
     throw new Error(`Project directory must contain a ${main} file`);
   }
 
diff --git a/fusion-cli/build/load-fusionrc.js b/fusion-cli/build/load-fusionrc.js
index 4e9c8be1c4..7ebe87b240 100644
--- a/fusion-cli/build/load-fusionrc.js
+++ b/fusion-cli/build/load-fusionrc.js
@@ -30,6 +30,7 @@ export type FusionRC = {
   zopfli?: boolean,
   gzip?: boolean,
   brotli?:boolean,
+  main?:string,
 };
 */
 
@@ -72,6 +73,7 @@ function isValid(config, silent) {
         'brotli',
         'zopfli', // TODO: Remove redundant zopfli option
         'gzip',
+        'main',
       ].includes(key)
     )
   ) {