diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index a28f6d70c95..04430152336 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -1509,7 +1509,7 @@ declare module 'vscode' {
 		 * @returns HTML fragment. We can probably return `CellOutput` instead of string ?
 		 *
 		 */
-		render(document: NotebookDocument, cell: NotebookCell, output: CellOutput): string;
+		render(document: NotebookDocument, cell: NotebookCell, output: CellOutput, mimeType: string): string;
 		preloads?: Uri[];
 	}
 
diff --git a/src/vs/workbench/api/common/extHostNotebook.ts b/src/vs/workbench/api/common/extHostNotebook.ts
index 9a1feb2b3cb..96277e4cbe4 100644
--- a/src/vs/workbench/api/common/extHostNotebook.ts
+++ b/src/vs/workbench/api/common/extHostNotebook.ts
@@ -339,7 +339,7 @@ export class ExtHostNotebookDocument implements vscode.NotebookDocument, vscode.
 			let handlers = this.renderingHandler.findBestMatchedRenderer(mimeType);
 
 			if (handlers.length) {
-				let renderedOutput = handlers[0].render(this, cell, output);
+				let renderedOutput = handlers[0].render(this, cell, output, mimeType);
 
 				orderMimeTypes.push({
 					mimeType: mimeType,
@@ -551,8 +551,8 @@ export class ExtHostNotebookOutputRenderer {
 		return false;
 	}
 
-	render(document: ExtHostNotebookDocument, cell: ExtHostCell, output: vscode.CellOutput): string {
-		let html = this.renderer.render(document, cell, output);
+	render(document: ExtHostNotebookDocument, cell: ExtHostCell, output: vscode.CellOutput, mimeType: string): string {
+		let html = this.renderer.render(document, cell, output, mimeType);
 
 		return html;
 		// return {