diff --git a/chartjs/dx.chartjs.d.ts b/chartjs/dx.chartjs.d.ts
index d4ca52b24..b98206e65 100644
--- a/chartjs/dx.chartjs.d.ts
+++ b/chartjs/dx.chartjs.d.ts
@@ -1 +1,6 @@
+// Type definitions for ChartJS
+// Project: http://js.devexpress.com/WebDevelopment/Charts/
+// Definitions by: DevExpress Inc. <http://devexpress.com/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
 /// <reference path="../devextreme/dx.chartjs.d.ts" />
\ No newline at end of file
diff --git a/phonejs/dx.phonejs.d.ts b/phonejs/dx.phonejs.d.ts
index 042ff6f73..c7e324cec 100644
--- a/phonejs/dx.phonejs.d.ts
+++ b/phonejs/dx.phonejs.d.ts
@@ -1 +1,6 @@
+// Type definitions for PhoneJS
+// Project: http://js.devexpress.com/MobileDevelopment/
+// Definitions by: DevExpress Inc. <http://devexpress.com/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
 /// <reference path="../devextreme/dx.phonejs.d.ts" />
\ No newline at end of file