diff --git a/scripts/after_prepare.js b/scripts/after_prepare.js
index 35bd1ca4b..0c78c0f0b 100755
--- a/scripts/after_prepare.js
+++ b/scripts/after_prepare.js
@@ -57,7 +57,7 @@ var files = [
 for(var i in files) {
     try {
     	var contents = fs.readFileSync(files[i]).toString()
-    	contents = contents.replace(/APP_ID/g, APP_ID)
+    	contents = contents.replace(/APP_ID/g, "'" + APP_ID + "'")
     	contents = contents.replace(/FACEBOOK_BROWSER_SDK_VERSION/g, "'" + FACEBOOK_BROWSER_SDK_VERSION + "'")
     	fs.writeFileSync(files[i], contents)
 	} catch(err) {}