diff --git a/src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts b/src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts
index 60681767ba862e1468fda76b79602b99ef3ac92f..f8e477f853a510e15db56f97894c2adc71d5ed54 100644
--- a/src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts
+++ b/src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts
@@ -49,7 +49,7 @@ export class TerminalInstance {
 		this.xterm.on('data', (data) => {
 			this.terminalProcess.process.send({
 				event: 'input',
-				data: data && data.replace(TerminalInstance.eolRegex, os.EOL)
+				data: this.sanitizeInput(data)
 			});
 			return false;
 		});
@@ -88,6 +88,10 @@ export class TerminalInstance {
 		this.parentDomElement.appendChild(this.wrapperElement);
 	}
 
+	private sanitizeInput(data: any) {
+		return typeof data === 'string' ? data.replace(TerminalInstance.eolRegex, os.EOL) : data;
+	}
+
 	public layout(dimension: Dimension): void {
 		if (!this.font || !this.font.charWidth || !this.font.charHeight) {
 			return;