diff --git a/src/extension-support/extension-manager.js b/src/extension-support/extension-manager.js
index a2c068feb..147d57305 100644
--- a/src/extension-support/extension-manager.js
+++ b/src/extension-support/extension-manager.js
@@ -21,7 +21,7 @@ const builtinExtensions = {
     music: Scratch3MusicBlocks,
     microbit: Scratch3MicroBitBlocks,
     translate: Scratch3TranslateBlocks,
-    videoSensing: Scratch3VideoSensingBlocks
+    videoSensing: Scratch3VideoSensingBlocks,
     speech: Scratch3SpeechBlocks
 };