diff --git a/jspsych-call-function.js b/jspsych-call-function.js
index ab5d0ca1..cdd7f03b 100644
--- a/jspsych-call-function.js
+++ b/jspsych-call-function.js
@@ -25,6 +25,7 @@
 				"func": params["func"],
 				"args": params["args"] || []
 			}
+			return trials;
 		}
 		
 		plugin.trial = function($this, block, trial, part)