diff --git a/src/api.proposed.variables.d.ts b/src/api.proposed.variables.d.ts
new file mode 100644
index 00000000000..84668c58a19
--- /dev/null
+++ b/src/api.proposed.variables.d.ts
@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+import type { Uri } from 'vscode';
+
+declare module './api' {
+    export interface IJupyterVariable {
+        name: string;
+        type: string;
+        fileName?: Uri;
+    }
+}