diff --git a/src/vs/editor/common/modes/snippetsRegistry.ts b/src/vs/editor/common/modes/snippetsRegistry.ts
index f88ccf926eb..6b861eca8d2 100644
--- a/src/vs/editor/common/modes/snippetsRegistry.ts
+++ b/src/vs/editor/common/modes/snippetsRegistry.ts
@@ -40,7 +40,7 @@ export interface ISnippet {
 	codeSnippet: string;
 }
 
-class SnippetsRegistry {
+class SnippetsRegistry implements ISnippetsRegistry {
 
 	private _snippets: { [modeId: string]: { [owner: string]: ISnippet[] } } = Object.create(null);
 
@@ -111,6 +111,6 @@ export function getNonWhitespacePrefix(model: IReadOnlyModel, position: IPositio
 	return '';
 }
 
-const snippetsRegistry = new SnippetsRegistry();
+const snippetsRegistry: ISnippetsRegistry = new SnippetsRegistry();
 Registry.add(Extensions.Snippets, snippetsRegistry);