diff --git a/src/goCheck.ts b/src/goCheck.ts
index 306a5e44e..54fb30d3e 100644
--- a/src/goCheck.ts
+++ b/src/goCheck.ts
@@ -28,6 +28,16 @@ export function removeTestStatus(e: vscode.TextDocumentChangeEvent) {
 	statusBarItem.text = '';
 }
 
+export function notifyIfGeneratedFile(e: vscode.TextDocumentChangeEvent) {
+	if (e.document.isUntitled || e.document.languageId !== 'go') {
+		return;
+	}
+
+	if (e.document.lineAt(0).text.match(/^\/\/ Code generated .* DO NOT EDIT\.$/)) {
+		vscode.window.showWarningMessage('This file seems to be generated. DO NOT EDIT.');
+	}
+}
+
 export function check(fileUri: vscode.Uri, goConfig: vscode.WorkspaceConfiguration): Promise<ICheckResult[]> {
 	outputChannel.clear();
 	let runningToolsPromises = [];
diff --git a/src/goMain.ts b/src/goMain.ts
index 94ba5a804..c44834d21 100644
--- a/src/goMain.ts
+++ b/src/goMain.ts
@@ -18,7 +18,7 @@ import { GoRunTestCodeLensProvider } from './goRunTestCodelens';
 import { GoSignatureHelpProvider } from './goSignature';
 import { GoWorkspaceSymbolProvider } from './goSymbol';
 import { GoCodeActionProvider } from './goCodeAction';
-import { check, removeTestStatus } from './goCheck';
+import { check, removeTestStatus, notifyIfGeneratedFile } from './goCheck';
 import { updateGoPathGoRootFromConfig, offerToInstallTools } from './goInstallTools';
 import { GO_MODE } from './goMode';
 import { showHideStatus } from './goStatus';
@@ -154,6 +154,7 @@ export function activate(ctx: vscode.ExtensionContext): void {
 	vscode.window.onDidChangeActiveTextEditor(showHideStatus, null, ctx.subscriptions);
 	vscode.window.onDidChangeActiveTextEditor(getCodeCoverage, null, ctx.subscriptions);
 	vscode.workspace.onDidChangeTextDocument(parseLiveFile, null, ctx.subscriptions);
+	vscode.workspace.onDidChangeTextDocument(notifyIfGeneratedFile, null, ctx.subscriptions);
 
 	startBuildOnSaveWatcher(ctx.subscriptions);