diff --git a/packages/angular_devkit/build_angular/src/builders/prerender/index.ts b/packages/angular_devkit/build_angular/src/builders/prerender/index.ts
index 9ebbd4402b94..5fa433f26e8c 100644
--- a/packages/angular_devkit/build_angular/src/builders/prerender/index.ts
+++ b/packages/angular_devkit/build_angular/src/builders/prerender/index.ts
@@ -217,7 +217,7 @@ async function _renderUniversal(
               inlineCriticalCss: !!normalizedStylesOptimization.inlineCritical,
               minifyCss: !!normalizedStylesOptimization.minify,
               outputPath,
-              route,
+              route: route[0] === '/' ? route : '/' + route,
               serverBundlePath,
             };