diff --git a/bin/node-lambda b/bin/node-lambda
index e4c2437b..15106a42 100755
--- a/bin/node-lambda
+++ b/bin/node-lambda
@@ -12,7 +12,7 @@ dotenv.load();
 
 var AWS_ENVIRONMENT = process.env.AWS_ENVIRONMENT || '';
 var CONFIG_FILE = process.env.CONFIG_FILE || '';
-var EVENT_SOURCE_FILE = process.env.EVENT_SOURCE_FILE || 'event_sources.json';
+var EVENT_SOURCE_FILE = process.env.EVENT_SOURCE_FILE || '';
 var EXCLUDE_GLOBS = process.env.EXCLUDE_GLOBS || '';
 var AWS_ACCESS_KEY_ID = process.env.AWS_ACCESS_KEY_ID;
 var AWS_SECRET_ACCESS_KEY = process.env.AWS_SECRET_ACCESS_KEY;