diff --git a/src/vs/editor/contrib/find/simpleFindWidget.ts b/src/vs/editor/contrib/find/simpleFindWidget.ts
index 3b031bb62929857836971a2cc2a100ff598c7b5b..c7833dcc2532de9ab8108d1523dc8f928d35662d 100644
--- a/src/vs/editor/contrib/find/simpleFindWidget.ts
+++ b/src/vs/editor/contrib/find/simpleFindWidget.ts
@@ -46,16 +46,12 @@ export abstract class SimpleFindWidget extends Widget {
 			label: NLS_FIND_INPUT_LABEL,
 			placeholder: NLS_FIND_INPUT_PLACEHOLDER,
 			validation: (value: string): InputBoxMessage | null => {
-				if (value.length === 0) {
-					return null;
-				}
-				if (!this._findInput.getRegex()) {
+				if (value.length === 0 || !this._findInput.getRegex()) {
 					return null;
 				}
 				try {
-					/* tslint:disable:no-unused-expression */
+					/* tslint:disable-next-line:no-unused-expression */
 					new RegExp(value);
-					/* tslint:enable:no-unused-expression */
 					return null;
 				} catch (e) {
 					return { content: e.message };