diff --git a/src/vs/code/electron-browser/issue/issueReporterMain.ts b/src/vs/code/electron-browser/issue/issueReporterMain.ts
index 271372281e1..896fb45d217 100644
--- a/src/vs/code/electron-browser/issue/issueReporterMain.ts
+++ b/src/vs/code/electron-browser/issue/issueReporterMain.ts
@@ -741,6 +741,12 @@ export class IssueReporter extends Disposable {
 				this.validateInput('description');
 			});
 
+			if (this.issueReporterModel.fileOnExtension()) {
+				document.getElementById('extension-selector').addEventListener('change', (event) => {
+					this.validateInput('extension-selector');
+				});
+			}
+
 			return false;
 		}