diff --git a/dojo-typings/build.gradle b/dojo-typings/build.gradle
--- a/dojo-typings/build.gradle
+++ b/dojo-typings/build.gradle
@@ -13,6 +13,7 @@ npm {
 sources {
     main { me ->
         ts {
+            // to check typings with the compiler
             srcDir me.typings
         }
     }
diff --git a/dojo-typings/src/main/typings/dijit/dijit.d.ts b/dojo-typings/src/main/typings/dijit/dijit.d.ts
--- a/dojo-typings/src/main/typings/dijit/dijit.d.ts
+++ b/dojo-typings/src/main/typings/dijit/dijit.d.ts
@@ -550,7 +550,7 @@ declare namespace dijit {
 	}
 
 	/* dijit/_WidgetBase */
-	interface _WidgetBase<Attrs = any> extends dojo.Stateful<Attrs>, Destroyable {
+	interface _WidgetBase<Attrs = any> extends dojo.Stateful<Attrs & _WidgetBase>, Destroyable {
 
 		/**
 		 * A unique, opaque ID string that can be assigned by users or by the
diff --git a/dojo-typings/src/main/typings/dijit/modules.d.ts b/dojo-typings/src/main/typings/dijit/modules.d.ts
--- a/dojo-typings/src/main/typings/dijit/modules.d.ts
+++ b/dojo-typings/src/main/typings/dijit/modules.d.ts
@@ -7,8 +7,14 @@ declare module 'dijit/_Widget' {
 }
 
 declare module 'dijit/_WidgetBase' {
-	type _WidgetBase = dijit._WidgetBase;
-	const _WidgetBase: dijit._WidgetBaseConstructor<_WidgetBase>;
+	type _WidgetBase<A = any> = dijit._WidgetBase<A>;
+
+    // individual _WidgetBase constructor to keep type parameters
+    interface _WidgetBaseConstructor {
+        new <A = any>(params?: Partial<_WidgetBase<A> & A>, srcNodeRef?: dojo.NodeOrString): _WidgetBase<A> & dojo._base.DeclareCreatedObject;
+        prototype: _WidgetBase;
+    }
+	const _WidgetBase: _WidgetBaseConstructor;
 	export = _WidgetBase;
 }
 
diff --git a/dojo-typings/src/test/ts/StoreTests.ts b/dojo-typings/src/test/ts/StoreTests.ts
--- a/dojo-typings/src/test/ts/StoreTests.ts
+++ b/dojo-typings/src/test/ts/StoreTests.ts
@@ -1,8 +1,9 @@
+import Memory = require("dojo/store/Memory");
 import Observable = require("dojo/store/Observable");
 
 interface Schedule {
 
-    id: string;
+    id?: string;
 
     title: string;
 
@@ -13,9 +14,15 @@ declare const store: dojo.store.api.Stor
 
 const observable = new Observable(store);
 
+const mem = new Memory<Schedule>();
+
 (async () => {
     observable.query().observe(() => {});
     store.query().forEach(() => {});
     const total = await store.query().total;
     const result = await store.query();
+
+    mem.query();
+
+    mem.add({duration: 10, title: "Test event"});
 })();
\ No newline at end of file
diff --git a/dojo-typings/src/test/ts/_WidgetTests.ts b/dojo-typings/src/test/ts/_WidgetTests.ts
new file mode 100644
--- /dev/null
+++ b/dojo-typings/src/test/ts/_WidgetTests.ts
@@ -0,0 +1,17 @@
+import _WidgetBase = require("dijit/_WidgetBase");
+
+interface ScheduleWidgetAttrs {
+    data: string[];
+}
+
+declare const w0: _WidgetBase<ScheduleWidgetAttrs>;
+
+w0.get("data");
+
+declare class ScheduleWidget extends _WidgetBase {
+    data: string[];
+}
+
+const w = new ScheduleWidget({title: "Year schedule", data: ["a", "b"] });
+
+w.get("data");
\ No newline at end of file