diff --git a/.gitignore b/.gitignore
index 393c387..ea005a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ out-tsc/
 debug.log
 npm-debug.log
 src/**/*.js
+src/**/*.d.ts
 !src/demo/systemjs.config.js
 !src/demo/systemjs.config.lib.js
 !**/*systemjs-angular-loader.js