diff --git a/scripts/build.js b/scripts/build.js
index 2104995c2..e4cb2ebb7 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -90,7 +90,7 @@ function removeBuildDir(val) {
 }
 
 // Remove "build/" from the entrypoint paths.
-['main', 'module', 'browser', 'types', "exports"].forEach(function(key) {
+['main', 'module', 'browser', 'types', 'exports'].forEach(function(key) {
   packageJSON[key] = removeBuildDir(packageJSON[key]);
 });