diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index a2ac862a1ff98707a927eb0eabfaeaf49ea3e2e9..2e683ce68b26ace9e50ce070977873aee7dbeb5d 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -22,6 +22,11 @@ declare module 'vscode' {
 
 	//#region Joh
 
+	/**
+	 *
+	 */
+	export type Declaration = Location | Location[] | DefinitionLink[];
+
 	/**
 	 * The declaration provider interface defines the contract between extensions and
 	 * the go to declaration feature.
@@ -37,7 +42,7 @@ declare module 'vscode' {
 		 * @return A declaration or a thenable that resolves to such. The lack of a result can be
 		 * signaled by returning `undefined` or `null`.
 		 */
-		provideDeclaration(document: TextDocument, position: Position, token: CancellationToken): ProviderResult<Definition | DefinitionLink[]>;
+		provideDeclaration(document: TextDocument, position: Position, token: CancellationToken): ProviderResult<Declaration>;
 	}
 
 	export namespace languages {