diff --git a/packages/schematics/angular/workspace/files/tsconfig.json.template b/packages/schematics/angular/workspace/files/tsconfig.json.template
index 10a757508f71..c8e87ddf97cf 100644
--- a/packages/schematics/angular/workspace/files/tsconfig.json.template
+++ b/packages/schematics/angular/workspace/files/tsconfig.json.template
@@ -10,6 +10,7 @@
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,<% } %>
     "skipLibCheck": true,
+    "isolatedModules": true,
     "esModuleInterop": true,
     "sourceMap": true,
     "declaration": false,