diff --git a/packages/angular_devkit/build_angular/src/webpack/configs/typescript.ts b/packages/angular_devkit/build_angular/src/webpack/configs/typescript.ts
index 74578d669edf..77b67a14af09 100644
--- a/packages/angular_devkit/build_angular/src/webpack/configs/typescript.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/configs/typescript.ts
@@ -60,6 +60,8 @@ function createIvyPlugin(
 
   const compilerOptions: CompilerOptions = {
     sourceMap: buildOptions.sourceMap.scripts,
+    declaration: false,
+    declarationMap: false,
   };
 
   if (buildOptions.preserveSymlinks !== undefined) {