diff --git a/packages/angular_devkit/build_angular/src/webpack/configs/common.ts b/packages/angular_devkit/build_angular/src/webpack/configs/common.ts
index c050e894e784..2508c545576b 100644
--- a/packages/angular_devkit/build_angular/src/webpack/configs/common.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/configs/common.ts
@@ -432,7 +432,7 @@ export function getCommonConfig(wco: WebpackConfigOptions): Configuration {
     entry: entryPoints,
     output: {
       path: path.resolve(root, buildOptions.outputPath),
-      publicPath: buildOptions.deployUrl,
+      publicPath: buildOptions.deployUrl ?? '',
       filename: ({ chunk }) => {
         if (chunk?.name === 'polyfills-es5') {
           return `polyfills-es5${hashFormat.chunk}.js`;