diff --git a/src/index.js b/src/index.js
index 3de28e9e..6b907603 100644
--- a/src/index.js
+++ b/src/index.js
@@ -366,7 +366,7 @@ function createConfig(options, entry, format, writeMeta) {
 			: () => resolve(options.cwd, 'mangle.json');
 
 	const useTypescript = extname(entry) === '.ts' || extname(entry) === '.tsx';
-	const emitDeclaration = !!(options.generateTypes || pkg.types || pkg.typings);
+	const emitDeclaration = options.generateTypes !== false && !!(pkg.types || pkg.typings);
 
 	const escapeStringExternals = ext =>
 		ext instanceof RegExp ? ext.source : escapeStringRegexp(ext);