diff --git a/package-lock.json b/package-lock.json
index ba7fe95..948cb61 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,7 +6,7 @@
   "packages": {
     "": {
       "name": "magic-string",
-      "version": "0.26.5",
+      "version": "0.26.6",
       "license": "MIT",
       "dependencies": {
         "sourcemap-codec": "^1.4.8"
diff --git a/src/MagicString.js b/src/MagicString.js
index 961c798..ea85160 100644
--- a/src/MagicString.js
+++ b/src/MagicString.js
@@ -350,8 +350,7 @@ export default class MagicString {
 
 	overwrite(start, end, content, options) {
 		options = options || {};
-		options.overwrite = !options.contentOnly;
-		return this.update(start, end, content, options);
+		return this.update(start, end, content, { ...options, overwrite: !options.contentOnly });
 	}
 
 	update(start, end, content, options) {