diff --git a/src/extensions/scratch3_ev3/index.js b/src/extensions/scratch3_ev3/index.js
index 016919f8c..b7b1d06dc 100644
--- a/src/extensions/scratch3_ev3/index.js
+++ b/src/extensions/scratch3_ev3/index.js
@@ -3,7 +3,7 @@ const BlockType = require('../../extension-support/block-type');
 const Cast = require('../../util/cast');
 const log = require('../../util/log');
 const Base64Util = require('../../util/base64-util');
-const BTSession = require('../../io/BTSession');
+const BTSession = require('../../io/btSession');
 
 // TODO: Refactor/rename all these high level primitives to be clearer/match